Electrode sheet production system and control method therefor

Abstract

An electrode sheet production system and a control method therefor. The electrode sheet production system comprises: a manufacturing execution system, a coating superordinate computer, a coating device, a cold pressing superordinate computer, a cold pressing device, a die cutting superordinate computer, and a die cutting device; the coating device, the cold pressing device, and the die cutting device are each provided with a radio frequency identification system, and the radio frequency identification system comprises a radio frequency reader-writer and an electronic tag; the manufacturing execution system is separately connected to the coating superordinate computer, the cold pressing superordinate computer, and the die cutting superordinate computer; the coating superordinate computer is connected to the coating device, the cold pressing superordinate computer is connected to the cold pressing device, and the die cutting superordinate computer is connected to the die cutting device; in each of the coating device, the cold pressing device, and the die cutting device, the radio frequency reader-writer is mounted on at least one side of a spindle, and the electronic tag is mounted on a drum of a material roll; the radio frequency reader-writer is used for reading a radio frequency code of the material roll from the electronic tag on the material roll on the spindle and transmitting the radio frequency code to the manufacturing execution system. According to the electrode sheet production system, the radio frequency code of the material roll can be automatically uploaded to the manufacturing execution system.

Description

Electrode production system and control method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2024102323025, filed on March 1, 2024, entitled “Pole production system and control method thereof,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a pole piece production system and a control method thereof. Background Art

[0004] Electrodes are core components of batteries, significantly impacting their energy density, performance, and cost. In the event of battery quality issues, it's often necessary to trace which coating roll produced the electrode and which batteries that roll was used to produce it. Therefore, during the electrode production process, material flow must be recorded to facilitate subsequent traceability.

[0005] In related technologies, the manufacturing execution system (MES) generates a film roll number for each roll produced during coating. A barcode containing the roll number is manually affixed to the roll. This barcode aligns the physical roll with the roll recorded in the MES. Subsequent processes use the barcode to identify the roll and record information about the roll produced in subsequent processes.

[0006] In the above-mentioned related technologies, data recording and management of each electrode production process are based on barcodes manually pasted on the material rolls. However, manual pasting is prone to errors, resulting in inconsistencies between the film roll number recorded in the manufacturing execution system and the film roll number contained in the barcode on the actual material roll, which in turn causes confusion during subsequent data tracing and makes it impossible to trace back accurate electrode production data.

[0007] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art.

[0008] Summary of the Invention

[0009] In view of the technical problem in the above-mentioned related technologies that manual data entry is prone to errors and thus cannot accurately trace data, the present application provides an electrode production system and a control method thereof.

[0010] In a first aspect of an embodiment of the present application, a pole piece production system is provided, comprising: a manufacturing execution system, a coating host computer, a coating device, a cold pressing host computer, a cold pressing device, a die-cutting host computer, and a die-cutting device, wherein the coating device, the cold pressing device, and the die-cutting device are each provided with a radio frequency identification system; the radio frequency identification system comprises a radio frequency reader and an electronic tag;

[0011] The manufacturing execution system is connected to the coating host computer, the cold pressing host computer and the die-cutting host computer respectively; the coating host computer is connected to the coating device, the cold pressing host computer is connected to the cold pressing device, and the die-cutting host computer is connected to the die-cutting device;

[0012] In the coating device, the cold pressing device and the die-cutting device, the radio frequency reader is installed on at least one side of the reel for placing the material roll, and the electronic tag is installed on the reel of the material roll;

[0013] The radio frequency reader is used to read the radio frequency code of the material roll from the electronic tag of the material roll on the reel and transmit it to the manufacturing execution system.

[0014] In this embodiment, RF readers are provided at the reels of the coating device, cold pressing device, and die-cutting device, and electronic tags are installed on the reels of the material rolls. The RF code of the material roll can be automatically uploaded to the manufacturing execution system through the RF reader, so that the manufacturing execution system can record the material roll based on the RF code on the physical material roll, effectively improving the consistency between the physical object and the system record, and helping to improve the accuracy of subsequent data tracing. It also reduces the human intervention component in the electrode production process, making the degree of automation of electrode production higher. Moreover, in this electrode production system, the coating device, cold pressing device, and die-cutting device each have their own corresponding host computer. This distributed deployment method decouples the data communication and processing between the various processes of the electrode production system. Even if an abnormality occurs in one process, it will not affect the normal operation of other processes.

[0015] In some embodiments of the present application, the coating device includes a first take-up reel for mounting a coating material roll and a first bracket provided on at least one side of the first take-up reel;

[0016] The radio frequency reader is installed on at least one of the first brackets, and the radio frequency range of the radio frequency reader covers one of the first winding reels.

[0017] An RFID reader / writer is installed on the first winding reel of the coating unit to automatically identify the RFID code of the coating roll. This helps to ensure that the actual coating roll produced corresponds to the film roll number recorded in the manufacturing execution system, reducing the possibility of discrepancies between the actual coating roll and the film roll number recorded in the manufacturing execution system. The RFID reader / writer's radio frequency range covers one first winding reel, so it only reads the electronic tag of the roll on the first winding reel, reducing interference from rolls on other first winding reels.

[0018] In some embodiments of the present application, the radio frequency reader mounted on the first bracket is used to read the electronic tag in the coating material roll on the first winding reel and transmit the read coating radio frequency data to the programmable controller included in the coating device;

[0019] The programmable controller of the coating device is used to transmit the coating radio frequency data to the coating host computer;

[0020] The coating host computer is used to determine the radio frequency code of the coating material roll based on the coating radio frequency data, and transmit the radio frequency code of the coating material roll to the manufacturing execution system.

[0021] The entire process described above does not require human intervention, and automatically identifies and uploads the RF code of the coating roll, thereby helping the manufacturing execution system to record the coating roll based on the RF code of the coating roll, thereby ensuring that the actual coating roll in the coating process is consistent with the records of the manufacturing execution system.

[0022] In some embodiments of the present application, the coating host computer is used to extract multiple radio frequency codes from the coating radio frequency data; based on the multiple radio frequency codes, the number of radio frequency codes with the same preset number of bits is counted; and the radio frequency code with the largest number counted is determined as the radio frequency code of the coating material roll.

[0023] The coating host computer determines the number of RF codes with the same pre-set number of digits from the coating RF data read by the RF reader, and determines the RF code with the largest number as the RF code of the coating material roll. In other words, the RF code read the most times is used as the RF code of the coating material roll, which improves the accuracy of RF code reading.

[0024] In some embodiments of the present application, the cold pressing device includes a first unwinding reel for mounting the coating material roll and a second winding reel for mounting the cold pressing material roll;

[0025] A second bracket is provided on at least one side of the first unwinding reel, and the radio frequency reader is installed on at least one bracket of each second bracket;

[0026] One end of the second winding reel is mounted on the first side surface of the first support plate, and a third bracket and a fourth bracket are also mounted on the first side surface; one end of the third bracket is mounted on the first side surface, and a radio frequency reader is provided on the end of the third bracket away from the first side surface;

[0027] One end of the fourth bracket is connected to an end of the third bracket close to the first side surface, one side surface of the fourth bracket is connected to the first support plate, the end of the other end of the fourth bracket is close to the position where the second winding reel is connected to the first support plate, and a radio frequency reader is provided at the other end of the fourth bracket; the power of the radio frequency reader on the third bracket is greater than the power of the radio frequency reader on the fourth bracket.

[0028] An RFID reader is installed at the unwinding point of the cold press to automatically read the RFID code of the unwound coated material roll. Based on this RFID code, the film roll number of the unwound coated material roll can be automatically and accurately obtained. RFID readers are installed on both sides of the second winding reel of the cold press, with the power of one side being greater than the power of the other, which can improve the accuracy of RFID code reading of the cold press roll.

[0029] In some embodiments of the present application, the radio frequency reader mounted on the second bracket is used to read the electronic tag in the coating material roll on the first unwinding reel and transmit the read coating radio frequency data to the programmable controller included in the cold pressing device;

[0030] The radio frequency reader / writer installed on the third bracket and the fourth bracket is used to read the electronic tag in the cold-pressed material roll on the second winding reel and transmit the read cold-pressed radio frequency data to the programmable controller included in the cold-pressing device;

[0031] The programmable controller of the cold pressing device is used to transmit the coating radio frequency data and the cold pressing radio frequency data to the cold pressing host computer;

[0032] The cold pressing host computer is used to determine the radio frequency code of the coated material roll on the first unwinding reel based on the coating radio frequency data; and determine the radio frequency code of the cold pressing material roll based on the cold pressing radio frequency data; and transmit the radio frequency code of the coated material roll and the radio frequency code of the cold pressing material roll to the manufacturing execution system.

[0033] During the cold press process, the RFID reader at the cold press unwinding position can automatically read the electronic tags on the unwound coated material roll, and the RFID reader at the cold press rewinding position can automatically read the electronic tags on the rewound cold press material roll. The read data is automatically uploaded to the cold press host computer via the programmable controller in the cold press device. The cold press host computer filters out the RFID code of the unwound coated material roll from the read coating RFID data, and filters out the RFID code of each rewound cold press material roll from the cold press RFID data, and uploads them to the manufacturing execution system. The entire process requires no human intervention, and automatically identifies and uploads the RFID codes of multiple rolls unwound and rewound in the cold press process. This helps the manufacturing execution system record the rolls based on their RFID codes, ensuring that the physical rolls in the cold press process are consistent with the records in the manufacturing execution system.

[0034] In some embodiments of the present application, the cold pressing host computer is used to obtain the RF code with the largest signal strength from the cold pressing RF data transmitted by the RF reader on the fourth bracket, as the RF code of the first cold pressing material roll on the second winding reel close to the fourth bracket; and to eliminate the RF code of the first cold pressing material roll from the cold pressing RF data transmitted by the RF reader on the third bracket, and obtain the RF code with the largest signal strength from the remaining cold pressing RF data, as the RF code of the second cold pressing material roll on the second winding reel close to the third bracket.

[0035] An RFID reader is installed on each side of the second winding reel. The RFID reader on the fourth bracket is closer to the cold-pressed material rolls and has relatively low power, resulting in a smaller RFID range. This helps read the RFID tags of cold-pressed material rolls closer to the fourth bracket while reducing interference from RFID tags of cold-pressed material rolls farther away. The RFID reader on the third bracket has a wider RFID range and can potentially read the RFID tags of all cold-pressed material rolls on the second winding reel. The RFID code of the first cold-pressed material roll identified by the RFID reader on the fourth bracket is first removed from the RFID codes read by the RFID reader on the third bracket. Then, the RFID code with the strongest RFID signal is selected from the remaining RFID codes. This ensures accurate reading of the RFID code of each cold-pressed material roll on the second winding reel.

[0036] In some embodiments of the present application, the die-cutting device includes a second support plate, a first fixing rod, a second fixing rod, a fifth bracket, a sixth bracket, a second unwinding reel for mounting a cold-pressed material roll, and a third winding reel for mounting a die-cutting material roll;

[0037] One end of the second unwinding reel, one end of the third winding reel, one end of the first fixing rod and one end of the second fixing rod are all mounted on the first side surface of the second supporting plate;

[0038] One end of the fifth bracket is mounted on the first fixing rod, and the other end of the fifth bracket is mounted with a radio frequency reader, the radio frequency range of the radio frequency reader covering the second unwinding reel;

[0039] One end of the sixth bracket is mounted on the second fixing rod, and the other end of the sixth bracket is mounted with a radio frequency reader, the radio frequency range of the radio frequency reader covering the third winding reel.

[0040] By using a fixing rod and a bracket, the RFID reader is installed near the unwinding reel and the rewinding reel in the die-cutting device, so as to automatically identify the RFID code of the cold-pressed material roll used in the die-cutting process and the RFID code of the generated die-cutting material roll. Then, the film roll number of the die-cutting process recorded in the manufacturing execution system can be matched with the automatically identified RFID code, so that the actual material roll in the die-cutting process is consistent with the record of the manufacturing execution system.

[0041] In some embodiments of the present application, the radio frequency reader mounted on the fifth bracket is used to read the electronic tag in the cold-pressed material roll on the second unwinding reel and transmit the read cold-pressed radio frequency data to the programmable controller included in the die-cutting device;

[0042] The radio frequency reader installed on the sixth bracket is used to read the electronic tag in the die-cutting material roll on the third winding reel and transmit the read die-cutting radio frequency data to the programmable controller included in the die-cutting device;

[0043] The programmable controller of the die-cutting device is used to transmit the cold pressing radio frequency data and the die-cutting radio frequency data to the die-cutting host computer;

[0044] The die-cutting host computer is used to determine the radio frequency code of the cold-pressed material roll on the second unwinding reel based on the cold-pressing radio frequency data; and to determine the radio frequency code of the die-cutting material roll based on the die-cutting radio frequency data; and to transmit the radio frequency code of the cold-pressed material roll and the radio frequency code of the die-cutting material roll to the manufacturing execution system.

[0045] The RF data read by the RF reader in the die-cutting device is transmitted to the die-cutting host computer via the programmable controller in the die-cutting device. The die-cutting host computer determines the RF code of the corresponding material roll based on the received RF data, and then uploads the determined RF code to the manufacturing execution system. This enables the automatic identification and upload of the RF codes of the material rolls at the unwinding and rewinding positions in the die-cutting process, so that the accounts of the material rolls in the die-cutting process recorded by the manufacturing execution system are consistent with the actual material rolls, which helps to accurately trace the data and materials of the die-cutting process during subsequent data tracing. In addition, the relevant operations of the die-cutting process are handled by the die-cutting device and its corresponding die-cutting host computer. Even if an abnormality occurs in the die-cutting process, it will not allow other processes such as the coating process and the cold pressing process to operate normally.

[0046] In some embodiments of the present application, the radio frequency reader in the die-cutting device is used to perform multiple reading operations during the die-cutting process, and upload the radio frequency data read multiple times to the die-cutting host computer through the programmable controller of the die-cutting device;

[0047] The die-cutting host computer is used to select the radio frequency code that is read the most times from the radio frequency data uploaded by each radio frequency reader in the die-cutting device as the radio frequency code finally identified.

[0048] Since there are many metal parts in the die-cutting device, the radio frequency signal will be reflected on the metal surface. Therefore, the radio frequency reader is read multiple times during the die-cutting process. The die-cutting host computer selects the radio frequency code that is read the most times from the radio frequency data read multiple times, which can effectively improve the accuracy of radio frequency identification in the die-cutting process.

[0049] In some embodiments of the present application, a plurality of electronic tags are mounted on the inner wall of the roll, and the data stored in each electronic tag includes the radio frequency code of the roll and the identification of the electronic tag, and the character string with the first preset number of digits is the radio frequency code of the roll;

[0050] A portion of the plurality of electronic tags is mounted on one end of the inner wall of the drum, and another portion of the plurality of electronic tags is mounted on the other end of the inner wall of the drum.

[0051] Installing multiple electronic tags on the inner wall of the roll increases the probability that the roll's electronic tag will be within the RF range of the RFID reader, thereby increasing the probability that the RFID reader will successfully read the roll's electronic tag. This is especially true for wider coated rolls, as multiple electronic tags can reduce the likelihood of RFID failures.

[0052] In some embodiments of the present application, the radio frequency identification system further includes a mounting member, the mounting member including a body, a spring formed on the body, and a fixing member;

[0053] One side of the body is an arc surface, and the other side is provided with a card slot, the electronic tag is inserted into the card slot, and the spring contacts the electronic tag and presses the electronic tag tightly;

[0054] The fixing member is used to fix the mounting member on the inner wall of the drum, and the arc surface contacts the inner wall of the drum.

[0055] The electronic tag can be firmly mounted on the reel of the material roll by the mounting member, so that the electronic tag is not easy to loosen or fall off, and the electronic tag can be easily disassembled or replaced.

[0056] In some embodiments of the present application, the coating device, the cold pressing device, and the die-cutting device all include switches and programmable controllers; the electrode production system also includes a workshop logistics and radio frequency middleware system, an automatic guided vehicle system, and a warehouse management system;

[0057] In the coating device, the cold pressing device and the die-cutting device, the radio frequency reader in each device is connected to the programmable controller via a switch;

[0058] The programmable logic controller of the coating device is connected to the coating host computer, the programmable logic controller of the cold pressing device is connected to the cold pressing host computer, and the programmable logic controller of the die-cutting device is connected to the die-cutting host computer;

[0059] The manufacturing execution system, the workshop logistics and radio frequency middleware system, the automatic guided vehicle system, and the warehouse management system are all connected to the coating host computer, the cold pressing host computer, and the die-cutting host computer through a local area network.

[0060] In the devices of each process, the RF reader communicates with the programmable controller in the device through the switch, and the RF code of the automatically identified material roll is uploaded to the corresponding host computer of the device through the programmable controller, and then uploaded to the manufacturing execution system through the host computer, thereby improving the operating efficiency of the entire electrode production system. The communication between the host computer corresponding to the device of each process and the manufacturing execution system, workshop logistics and RF middleware system, automatic guided vehicle system and warehouse management system helps to realize the automatic flow of information in each process of electrode production, such as coating, cold pressing, and die-cutting, and improve the degree of automation of electrode production.

[0061] A second aspect of some embodiments of the present application provides a control method for a pole piece production system, which is applied to the pole piece production system described in the first aspect above, and the method includes:

[0062] In response to the coating rewinding signal, the RF reader at the rewinding reel of the coating process is controlled to read the RF code of the coating material roll from the electronic tag of the reeled coating material roll and generate the coating film roll number of the coating material roll;

[0063] In response to the cold press unwinding signal, the radio frequency reader / writer at the unwinding reel of the cold press process is controlled to read the radio frequency code of the unwound coated material roll from the electronic tag of the unwound coated material roll; based on the radio frequency code of the unwound coated material roll, the corresponding coated film roll number is obtained; based on the obtained coated film roll number, the cold press film roll number is generated; in response to the cold press winding signal, the radio frequency reader / writer at the winding reel of the cold press process is controlled to read the radio frequency code of the cold press material roll from the electronic tag of the wound cold press material roll;

[0064] In response to the die-cutting unwinding signal, the radio frequency reader / writer at the unwinding reel of the die-cutting process is controlled to read the radio frequency code of the unwound cold-pressed material roll from the electronic tag of the unwound cold-pressed material roll; based on the radio frequency code of the unwound cold-pressed material roll, the corresponding cold-pressed film roll number is obtained; based on the obtained cold-pressed film roll number, the die-cutting film roll number is generated; in response to the die-cutting rewinding signal, the radio frequency reader / writer at the rewinding reel of the die-cutting process is controlled to read the radio frequency code of the die-cutting material roll from the electronic tag of the rewound die-cutting material roll.

[0065] During the rewinding process in the coating process, the unwinding and rewinding process in the cold pressing process, and the unwinding and rewinding process in the die-cutting process, the RF code of the material roll is automatically identified by the RF reader and the film roll number of each process is generated. This ensures that the RF code on the actual material roll accurately corresponds to the film roll number recorded by the system, effectively improving the consistency between the actual material and the system record, and helping to improve the accuracy of subsequent data traceability. The entire electrode production process does not require manual affixing of barcodes on the material roll, reducing the human intervention component of the electrode production process and improving the degree of automation of electrode production.

[0066] In some embodiments of the present application, the method further comprises:

[0067] In the coating process, the mapping relationship between the coating film roll number and the radio frequency code of the coating material roll obtained by winding is stored;

[0068] In the cold pressing process, a mapping relationship between the radio frequency code of the unwound coating roll, the cold pressing film roll number, and the radio frequency code of the rewound cold pressing roll is stored;

[0069] In the die-cutting process, a mapping relationship between the radio frequency code of the unwound cold-pressed material roll, the roll number of the die-cut film, and the radio frequency code of the wound die-cut material roll is stored.

[0070] In the coating process, cold pressing process, and die-cutting process, after the RF code of the material roll is automatically read by the RF reader, the mapping relationship between the RF code of the material roll in each process and the corresponding film roll number is also stored, so that the required data can be quickly traced based on these mapping relationships during the subsequent data tracing process. In addition, the mapping relationship stored in the cold pressing process associates the RF code of the coating material roll, the cold pressing film roll number, and the RF code of the produced cold pressing material roll. Based on this mapping relationship, the RF code of the coating material roll can be used to query the information of the cold pressing material roll slit from the coating material roll. The RF code and / or cold pressing film roll number of the cold pressing material roll can also be used to query which coating material roll the cold pressing material roll was slit from. Similarly, in the die-cutting process, the RF code of the cold-pressed roll, the die-cut film roll number, and the RF code of the wound die-cut roll are linked together. Thus, the RF code of the cold-pressed roll can be used to query information about the die-cut rolls slit from the cold-pressed roll, and the RF code and / or die-cut film roll number of the die-cut roll can also be used to query which cold-pressed roll the die-cut roll was die-cut from. This links the material flows between the coating process, the cold-pressing process, and the die-cutting process, allowing material information between these multiple processes to be traced from the coating process to the die-cutting process, and vice versa. This expands the scope of data traceability in the electrode production process and improves traceability efficiency and accuracy.

[0071] In some embodiments of the present application, a plurality of electronic tags are installed on the coated material roll, and the step of reading the radio frequency code of the coated material roll includes:

[0072] Based on the data of multiple electronic tags read, the number of electronic tags with the same number of pre-set digits is counted;

[0073] The character sequence of the first preset number of digits is extracted from the data of the electronic tags with the largest number of digits counted as the radio frequency code of the coating material roll.

[0074] In the coating process, multiple electronic tags are set on the coating material roll. When the radio frequency reader reads multiple radio frequency codes, the radio frequency code read the most times is taken as the radio frequency code of the coating material roll, which can effectively improve the accuracy of identifying the radio frequency code of the coating material roll in the coating process.

[0075] In some embodiments of the present application, a first radio frequency reader and a second radio frequency reader are respectively provided on both sides of the winding reel of the cold pressing process, and the power of the first radio frequency reader is greater than the power of the second radio frequency reader; and reading the radio frequency code of the cold pressed material roll includes:

[0076] Selecting the RF code with the strongest RF signal strength from the RF codes read by the second RF reader as the RF code of the first cold-pressed material roll on the winding reel of the cold-pressing process close to the second RF reader;

[0077] The RF code of the first cold-pressed material roll is removed from the RF codes read by the first RF reader, and the RF code with the strongest RF signal strength is obtained from the remaining RF codes as the RF code of the second cold-pressed material roll on the winding reel of the cold pressing process close to the first RF reader.

[0078] During the cold-pressing process, a first RFID reader and a second RFID reader are placed on either side of the winding reel. The second RFID reader is closer to the cold-pressed material rolls and has a relatively low power, resulting in a smaller RFID range. This helps read the RFID tags of cold-pressed material rolls closer to the second RFID reader, while reducing interference from RFID tags of cold-pressed material rolls farther away. The first RFID reader, on the other hand, has a wider RFID range and may read the RFID tags of all cold-pressed material rolls on the winding reel. The RFID code of the first cold-pressed material roll identified by the second RFID reader is first removed from the RFID codes read by the first RFID reader. The RFID code with the strongest signal is then selected from the remaining RFID codes as the RFID code for the second cold-pressed material roll. This ensures accurate reading of the RFID code of every cold-pressed material roll on the winding reel during the cold-pressing process.

[0079] In some embodiments of the present application, reading the radio frequency code of the die-cut material roll includes:

[0080] The radio frequency reader at the reel that controls the die-cutting process reads the electronic tags of the reeled die-cut material multiple times;

[0081] The radio frequency code read the most times is determined as the radio frequency code of the die-cutting material roll.

[0082] It can automatically identify the radio frequency code of the die-cutting material roll generated by the die-cutting process, read it multiple times and select the radio frequency code with the strongest radio frequency signal, thereby improving the reading accuracy of the die-cutting process.

[0083] In some embodiments of the present application, in a coating process, in response to a reeling end signal triggered by a cutter, a first-side coating production volume of a target coating material roll currently reeled is obtained;

[0084] Recording the first-side coating production volume in the film roll information corresponding to the coating film roll number of the target coating material roll;

[0085] Receiving a first side data collection end instruction, determining that coating of the first side of the target coated material roll is completed;

[0086] Controlling a coating device to perform a coating operation on a second side of the target coating material roll, where the second side is the other side opposite to the first side;

[0087] A second side data collection end instruction is received, and it is determined that coating of the target coating material roll is completed.

[0088] In the above method, the production volume of the coating material roll is automatically recorded in the coating process and recorded in the film roll information corresponding to the coating film roll number. After the first side is coated, the coating operation of the second side is automatically controlled. The entire process is automated, reducing manual intervention and improving the automation and coating efficiency of the coating process.

[0089] In some embodiments of the present application, the method further comprises:

[0090] In the cold pressing process, a reeling end signal of the last split reel corresponding to the currently unrolled coated material roll is detected, and the current account quantity corresponding to the currently unrolled coated material roll is obtained;

[0091] Calculate the ratio of the current account quantity to the number of rolls of each target cold-pressed roll, use the ratio as the account production of each target cold-pressed roll, and store the account production of each target cold-pressed roll in the film roll information of the cold-pressed film roll number corresponding to each target cold-pressed roll.

[0092] In the cold pressing process, based on the current account number of the unwound coated material roll, the production volume of each cold pressed material roll obtained by the last split reel is automatically calculated, thereby improving the accuracy of the production volume record of the cold pressed material roll.

[0093] In some embodiments of the present application, the method further comprises:

[0094] In response to the winding end signal of the last split winding, obtaining the current physical quantity corresponding to the currently unwound coating material roll;

[0095] When the current account quantity is less than the current physical quantity, in response to entering the die-cutting process, calculating the actual production volume of each target cold-pressed material roll based on the current physical quantity and the number of rolls of each target cold-pressed material roll;

[0096] In the film roll information corresponding to the die-cut film roll number, the account production volume of each target cold-pressed material roll is respectively modified to the actual production volume of each target cold-pressed material roll.

[0097] During the last splitting of the coated material roll, if the current account quantity of the coated material roll is less than the current physical quantity, then when entering the die-cutting process, the actual production volume of each target cold-pressed material roll is calculated based on the current physical quantity and the number of rolls of each target cold-pressed material roll, and the account production volume of each cold-pressed material roll is adjusted to the actual production volume, so that the account production volume of the cold-pressed material roll unwound in the die-cutting process is consistent with the actual situation, which helps to improve the consistency of the account and actual situation of the material roll accounting in the die-cutting process.

[0098] In some embodiments of the present application, the method further comprises:

[0099] In response to a reeling end signal in the die-cutting process, obtaining the current account quantity and the current physical quantity of the currently unwound cold-pressed material roll;

[0100] When the current physical quantity is less than or equal to the current account quantity, calculating a first ratio between the current physical quantity and the number of rolls of each die-cutting material roll, and storing the first ratio as the account production quantity of each die-cutting material roll in the film roll information of the die-cutting film roll number corresponding to each die-cutting material roll;

[0101] When the current physical quantity is greater than the current account quantity, the current account quantity of the currently unwound cold-pressed material roll recorded in the system is modified to the current physical quantity, and the second ratio between the modified current account quantity and the number of rolls of each die-cutting material roll is calculated, and the second ratio is stored as the account production quantity of each die-cutting material roll in the film roll information of the die-cutting film roll number corresponding to each die-cutting material roll.

[0102] In the die-cutting process, the account production volume of the die-cutting roll is calculated based on the current physical quantity, so that the account growth volume of the die-cutting roll is closer to the actual production volume, and the accuracy of the account production volume of the die-cutting roll recorded in the die-cutting process is improved.

[0103] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments of the present application and are not to be considered as limiting the present application. In addition, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0105] FIG1 is a schematic structural diagram of a pole piece production system provided according to one or more embodiments of the present application;

[0106] FIG2 is a schematic structural diagram of a coating reel in a coating device according to one or more embodiments of the present application;

[0107] FIG3A is a schematic structural diagram of a cold pressing unwinding device according to one or more embodiments of the present application;

[0108] FIG3B is a schematic diagram of the structure of cold pressing and winding in a cold pressing device according to one or more embodiments of the present application;

[0109] FIG4 is a schematic structural diagram of die-cutting unwinding and die-cutting rewinding in a die-cutting device according to one or more embodiments of the present application;

[0110] FIG5 is a schematic diagram of the structure of a mounting member provided according to one or more embodiments of the present application and a rendering of the effect of mounting an electronic tag on the inner wall of a reel using the mounting member;

[0111] FIG6 is another schematic structural diagram of a pole piece production system provided according to one or more embodiments of the present application;

[0112] FIG7 is a flow chart of a control method for a pole piece production system according to one or more embodiments of the present application;

[0113] FIG8 is a schematic diagram of a pole piece production process according to one or more embodiments of the present application;

[0114] FIG9 is a schematic diagram of the network architecture of a pole piece production system provided according to one or more embodiments of the present application. DETAILED DESCRIPTION

[0115] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0116] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0117] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0118] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0119] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0120] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0121] Batteries are now widely used in a wide range of applications, including electric vehicles and energy storage systems. Among the battery's components, the positive and negative electrodes significantly impact the battery's energy density, performance, and cost. In the event of battery quality issues, it is often necessary to trace the coating roll from which the electrode was produced and which batteries were produced using that roll. Therefore, accurate records of material flow are essential during the electrode production process to facilitate subsequent data tracing.

[0122] Electrode production involves multiple processes, including coating, cold pressing, and die-cutting. During the coating process, a coating machine evenly coats the current collector surface with slurry and dries it. The resulting electrode is then wound onto a reel to create a coated roll. During the cold pressing process, the electrode from the coated roll is cold-pressed, and the wider roll is cut into multiple, relatively narrower, cold-pressed rolls. During the die-cutting process, the cold-pressed roll is further cut, with each roll being divided into multiple, smaller, die-cut rolls.

[0123] In related art, during the coating process, the manufacturing execution system automatically generates the coating film roll number for the coating roll and establishes a mapping relationship between the coating film roll number and the corresponding roll information of the coating roll. The roll information includes, but is not limited to, the electrode width, length, production time, current collector material type, slurry material type, coating thickness, etc. Based on the coating film roll number of the coating roll, the manufacturing execution system calls a printing device to print a barcode that includes the coating film roll number. The barcode is affixed to the coating roll by workshop technicians. During the cold pressing process, after a coating roll is installed on the cold pressing device, the barcode on the coating roll is scanned to identify the coating film roll number included in the barcode, and a mapping relationship is established between the coating film roll number and the relevant roll information of the cold pressing roll generated during the cold pressing process. The cold pressing roll is also affixed to the cold pressing roll by workshop technicians with a barcode containing the cold pressing film roll number. The data processing in the subsequent cold pressing and die-cutting processes is similar to that of the coating process.

[0124] In the above process, workshop technicians affix barcodes containing the film roll number to the rolls to match the physical rolls with the rolls recorded in the manufacturing execution system. However, this manual barcode affixing method is prone to uneven affixing, making subsequent barcodes unrecognizable. There are even cases where the barcode of roll A is affixed to roll B, causing the film roll number contained in the barcode on the roll to be inconsistent with the film roll number recorded in the manufacturing execution system, making it impossible to trace the correct data later.

[0125] Based on this, an embodiment of the present application provides a pole piece production system that adds a radio frequency identification system to the existing pole piece production system. For the production devices used in different processes of pole piece production, such as the coating device, cold pressing device, and die-cutting device, a radio frequency reader is set near the reel for mounting the material roll in these devices, and an electronic tag is installed on the reel of the material roll. The electronic tag stores the radio frequency code of the material roll. During the pole piece production process, the radio frequency code stored in the electronic tag of the material roll is read by the radio frequency reader and automatically transmitted to the manufacturing execution system.

[0126] Based on the above-mentioned electrode production system, there is no need to manually affix barcodes to the material rolls. The RFID system can automatically upload the material roll's RF code to the manufacturing execution system through the RFID system, so that the manufacturing execution system can establish a mapping relationship between the material roll's RF code and the film roll number. This ensures that the RF code on the actual material roll can accurately correspond to the film roll number recorded in the manufacturing execution system, achieving consistency between the actual material and the system records, thereby improving the accuracy of subsequent data traceability. It also reduces the manual intervention component in the electrode production process and improves the degree of automation of electrode production.

[0127] The electrode production system provided in the embodiments of this application can be used to produce electrode sheets for any type of battery, such as those for lithium iron phosphate batteries, ternary lithium batteries, and other batteries with different chemical material systems. It can also be expanded to the battery field or other fields to produce any product that includes processes such as coating and cutting.

[0128] Referring to FIG1 , some embodiments of the present application provide a pole piece production system, comprising: a manufacturing execution system 1, a coating host computer 2, a coating device 3, a cold pressing host computer 4, a cold pressing device 5, a die-cutting host computer 6, and a die-cutting device 7. The coating device 3, the cold pressing device 5, and the die-cutting device 7 are all provided with a radio frequency identification system 8; the radio frequency identification system 8 includes a radio frequency reader 81 and an electronic tag 82;

[0129] The manufacturing execution system 1 is connected to the coating host computer 2, the cold pressing host computer 4 and the die-cutting host computer 6 respectively; the coating host computer 2 is connected to the coating device 3, the cold pressing host computer 4 is connected to the cold pressing device 5, and the die-cutting host computer 6 is connected to the die-cutting device 7; in the coating device 3, the cold pressing device 5 and the die-cutting device 7, the radio frequency reader 81 is installed on at least one side of the reel for placing the material roll, and the electronic tag 82 is installed on the reel of the material roll; the radio frequency reader 81 is used to read the radio frequency code of the material roll from the electronic tag 82 of the material roll on the reel and transmit it to the manufacturing execution system 1.

[0130] The dotted line between the RF reader 81 and the electronic tag 82 in FIG1 represents a wireless RF communication connection.

[0131] In some embodiments of the present application, the manufacturing execution system 1 may include an MES (Manufacturing Execution System) system. The manufacturing execution system 1, the coating host computer 2, the coating device 3, the cold pressing host computer 4, the cold pressing device 5, the die-cutting host computer 6, and the die-cutting device 7 are typically deployed in the same factory building or workshop and located in the same local area network. They can communicate through the local area network or through wireless communication methods such as WiFi or Bluetooth.

[0132] The coating device 3, the cold pressing device 5 and the die-cutting device 7 include a reel for mounting the material roll, and the material roll is sleeved on the reel during the production process. An electronic tag 82 is installed on the reel of the material roll. The electronic tag 82 is a data carrier of RFID (Radio Frequency Identification) technology. Data can be stored in the electronic tag 82. In the embodiment of the present application, a radio frequency code is stored in the electronic tag 82. Non-contact data communication can be performed between the electronic tag 82 and the radio frequency reader 81 through wireless radio frequency. The radio frequency reader 81 arranged on one side of the reel can read the radio frequency code stored in the electronic tag 82.

[0133] The RF code is a character sequence pre-written into the electronic tag 82 that uniquely identifies the reel on which the electronic tag 82 resides. The character sequence in the RF code can include characters identifying the type of current collector, the type of coating slurry, and the manufacturer of the reel. The RF code stored in the electronic tag 82 attached to each reel is unique.

[0134] After the RF reader 81 reads the RF data from the electronic tag 82, it transmits the RF data to the host computer connected to the device through the device where the RF reader 81 is located. The host computer filters out the RF code of the material roll from the RF data and then transmits the RF code to the manufacturing execution system 1.

[0135] The coating device 3 is used to perform the coating process in the electrode production process. The coating device 3 is used to evenly coat the slurry on the collector and dry it to make positive and negative electrode sheets. The coating device 3 produces a coating material roll, which is obtained by winding the positive electrode sheet or the negative electrode sheet on a reel.

[0136] During the coating process, a radio frequency reader 81 is provided at the winding reel at the winding position in the coating device 3. The radio frequency reader 81 reads the electronic tag 82 of the coating material roll on the winding reel, and transmits the read radio frequency data to the coating host computer 2 through the coating device 3. The coating host computer 2 filters out the radio frequency code of the coating material roll from the radio frequency data, and then uploads the radio frequency code to the manufacturing execution system 1.

[0137] The cold pressing device 5 is used to perform the cold pressing process in the electrode production process. The cold pressing device 5 includes a roller pressing device and a pre-slitting device. The roller pressing device is used to further compact the coated electrode, and the pre-slitting device is used to continuously longitudinally cut the wider roll of electrode into several narrow pieces of the required width, that is, to cut the wider coated material roll into multiple cold-pressed material rolls with relatively smaller widths.

[0138] During the cold pressing process, a radio frequency reader / writer 81 is provided at the unwinding reel at the unwinding position in the cold pressing device 5. The radio frequency reader / writer 81 reads the electronic tag 82 of the coating material roll on the unwinding reel. A radio frequency reader / writer 81 is also provided at the rewinding reel at the rewinding position in the cold pressing device 5. The radio frequency reader / writer 81 at both the unwinding position and the rewinding position transmits the read radio frequency data to the cold pressing host computer 4 through the cold pressing device 5. The cold pressing host computer 4 filters out the radio frequency code of the unwound coating material roll and the radio frequency code of the rewound cold pressing material roll from the received radio frequency data, and uploads the filtered radio frequency codes to the manufacturing execution system 1.

[0139] The die-cutting device 7 is used to perform the die-cutting process in the electrode production process. The die-cutting device 7 is used to punch and shape the electrode of the cold-pressed material roll obtained in the cold-pressing process to obtain multiple die-cut material rolls for use in subsequent processes.

[0140] During the die-cutting process, a radio frequency reader / writer 81 is provided on the unwinding reel at the unwinding position of the die-cutting device 7. The radio frequency reader / writer 81 reads the electronic tag 82 of the cold-pressed material roll on the unwinding reel. A radio frequency reader / writer 81 is also provided on the rewinding reel at the rewinding position of the die-cutting device 7. The radio frequency readers / writers 81 at both the unwinding position and the rewinding position transmit the read radio frequency data to the die-cutting host computer 6 through the die-cutting device 7. The die-cutting host computer 6 then filters out the radio frequency code of the unwound cold-pressed material roll and the radio frequency code of the rewound die-cutting material roll from the received radio frequency data, and uploads the filtered radio frequency codes to the manufacturing execution system 1.

[0141] This eliminates the need to manually attach barcodes to the rolls. The RFID system 8 in each process automatically uploads the roll's RF code to the Manufacturing Execution System 1, which then maps the roll's RF code to the film roll number. This ensures that the RF code on the actual roll accurately corresponds to the film roll number recorded in the Manufacturing Execution System 1, effectively improving the consistency between the actual roll and the system's records and contributing to the accuracy of subsequent data traceability. This also reduces manual intervention in the electrode production process, making electrode production more automated.

[0142] Moreover, in the electrode production system, the coating device, cold pressing device and die-cutting device each have their own corresponding host computer. This distributed deployment method decouples the data communication and processing between the various processes of the electrode production system. Even if an abnormality occurs in one process, it will not affect the normal operation of other processes.

[0143] In some embodiments of the present application, as shown in Figure 2, the coating device 3 includes a first winding reel 31 for mounting a coating material roll and a first bracket 32 ​​arranged on at least one side of the first winding reel 31; a radio frequency reader 81 is installed on at least one bracket of each first bracket 32, and the radio frequency range of the radio frequency reader 81 covers one first winding reel 31.

[0144] Figure 2 only schematically shows the installation position relationship of the first winding reel 31, the first bracket 32 ​​and the radio frequency reader 81. Other parts of the coating device 3 are not shown in Figure 2. Figure 2 schematically shows two first brackets 32 and two radio frequency readers 81, and other numbers may be used in actual applications.

[0145] A radio frequency reader 81 may be provided on one or the other axial side of the first winding reel 31, or a radio frequency reader 81 may be provided on both axial sides. The radio frequency reader 81 may be fixedly mounted on the bracket by means of screws, nuts, or the like.

[0146] During the electrode production process, each process selects the RF reader 81 and designs the bracket for installing the RF reader 81 based on the actual conditions of the production equipment. In the coating process, the material roll is large, the reading distance is long, and when there are multiple reels, the distance between adjacent material rolls is short, which can easily cause cross-reading. In this context, the RF reader 81 can use a reader with a narrow beam antenna. The narrow beam antenna can better constrain the reading range of the RF reader 81 to a smaller angle range, such as constraining the reading range to an angle of 45° or 50° with the RF reader 81 as the vertex. The RF reader 81 is installed on both sides of the first winding reel 31 to adapt to the wider width of the coating material roll. Having an RF reader 81 on each side can improve the accuracy of RF code reading.

[0147] The coating device 3 may include only one first winding reel 31, on which a reel is sleeved, and the electrode sheet is wound on the reel to form a coating material roll. In other embodiments, the coating device 3 may also include two or more first winding reels 31, and reels may be sleeved on multiple first winding reels 31. After the reel on the first winding reel 31 in the winding state completes winding, another first winding reel 31 may be adjusted to the winding state. The radio frequency range of the radio frequency reader 81 covers one first winding reel 31, and may only cover the first winding reel 31 in the winding state.

[0148] A radio frequency reader / writer 81 is installed on the first take-up reel 31 of the coating device 3 to automatically identify the radio frequency code of the coating material roll. This helps to ensure a one-to-one correspondence between the actual coating material roll produced and the film roll number recorded in the manufacturing execution system 1, thereby reducing the possibility of inconsistencies between the actual coating material roll and the film roll number recorded in the manufacturing execution system 1. The radio frequency range of the radio frequency reader / writer 81 covers one first take-up reel 31, so that only the electronic tag 82 of the film roll on the first take-up reel 31 is read, reducing interference from the film rolls on other first take-up reels 31.

[0149] In some embodiments of the present application, the radio frequency reader 81 mounted on the first bracket 32 ​​is used to read the electronic tag 82 in the coating material roll on the first take-up reel 31 and transmit the read coating radio frequency data to the programmable controller included in the coating device 3;

[0150] The programmable controller of the coating device 3 is used to transmit the coating radio frequency data to the coating host computer 2;

[0151] The coating host computer 2 is used to determine the radio frequency code of the coating material roll based on the coating radio frequency data, and transmit the radio frequency code of the coating material roll to the manufacturing execution system 1.

[0152] During the coating process, the RFID reader / writer 81 automatically reads the electronic tag 82 on the coating roll, and the read data is automatically uploaded to the coating host computer 2 via the programmable controller in the coating device 3. The coating host computer 2 then filters the coating roll's RFID code from the coating RFID data read by the RFID reader / writer 81 and uploads it to the manufacturing execution system 1. This entire process requires no human intervention, automatically identifying and uploading the coating roll's RFID code. This helps the manufacturing execution system 1 record the coating roll based on its RFID code, ensuring consistency between the actual coating roll during the coating process and the records in the manufacturing execution system 1.

[0153] In some embodiments of the present application, the coating host computer 2 is used to extract multiple radio frequency codes from the coating radio frequency data; based on the multiple radio frequency codes, the number of radio frequency codes with the same preset number of bits is counted; and the radio frequency code with the largest number counted is determined as the radio frequency code of the coating material roll.

[0154] Since the coating material roll is relatively large, in order to improve the reading accuracy of the electronic tag 82 on the coating material roll, multiple electronic tags 82 can be installed on the inner wall of the roll drum of the coating material roll. The first preset number of bits of the data stored in the multiple electronic tags 82 on the coating material roll are the same, which is used to characterize the radio frequency code of the coating material roll, and the last preset number of bits is different, which is used to identify each electronic tag 82. In the case where multiple electronic tags 82 are set in the coating material roll, each time the electronic tags 82 on the coating material roll are read by the radio frequency reader 81, data from multiple electronic tags 82 may be read. In other embodiments, during the coating process, the radio frequency reader 81 at the first winding reel 31 in the coating device 3 can also be controlled to perform reading operations multiple times.

[0155] The coating host computer 2 determines the number of RF codes with the same pre-set number of digits from the coating RF data read by the RF reader 81, and determines the RF code with the largest number as the RF code of the coating material roll. In other words, the RF code read the most times is used as the RF code of the coating material roll, which improves the accuracy of RF code reading.

[0156] In some embodiments of the present application, as shown in FIG3A and FIG3B , the cold pressing device 5 includes a first unwinding reel 51 for mounting a coating material roll and a second winding reel 52 for mounting a cold pressing material roll;

[0157] As shown in FIG3A , a second bracket 53 is provided on at least one side of the first unwinding reel 51 , and a radio frequency reader 81 is installed on at least one bracket of each second bracket 53 ;

[0158] As shown in Figure 3B, one end of the second winding reel 52 is installed on the first side surface of the first support plate 54, and a third bracket 55 and a fourth bracket 56 are also installed on the first side surface. One end of the third bracket 55 is installed on the first side surface, and a radio frequency reader 81 is provided at the end of the third bracket 55 away from the first side surface; one end of the fourth bracket 56 is connected to the end of the third bracket 55 close to the first side surface, and one side surface of the fourth bracket 56 is connected to the first support plate 54. The end of the other end of the fourth bracket 56 is close to the position where the second winding reel 52 is connected to the first support plate 54, and the other end of the fourth bracket 56 is provided with a radio frequency reader 81; the power of the radio frequency reader 81 on the third bracket 55 is greater than the power of the radio frequency reader 81 on the fourth bracket 56.

[0159] FIG3A shows a schematic diagram of the unwinding-related structure of the cold pressing device 5 , and FIG3B shows a schematic diagram of the winding-related structure. Other structures included in the cold pressing device 5 are not shown in FIG3A and FIG3B .

[0160] In the cold press device 5, the first unwinding reel 51 is loaded with a coating material roll, and the second take-up reel 52 is loaded with multiple cold-pressed material rolls processed and slit by the cold press device 5. Therefore, the RF reader 81 at the first unwinding reel 51 can be configured with the same model and RF range as the RF reader 81 at the first take-up reel 31 in the coating device 3, but they can also be configured differently.

[0161] Because multiple cold-pressed coils are cut during the cold-pressing process, multiple coils may be mounted on a single second winding reel 52. Therefore, the RFID reader 81 on the second winding reel 52 may need to read the electronic tags 82 of multiple cold-pressed coils. To improve reading accuracy, RFID readers 81 are installed on both sides of the second winding reel 52. The power of the RFID readers 81 on each side is different, with the power on one side being greater than the power on the other side.

[0162] As shown in FIG3B , the RF reader 81 on the fourth bracket 56 is closer to the cold-pressed material roll. The power of the RF reader 81 on the fourth bracket is relatively low, so the RF range is also small, which helps to read the electronic tags 82 of the cold-pressed material rolls closer to the fourth bracket 56 and reduce the interference of the electronic tags 82 of the cold-pressed material rolls farther from the fourth bracket 56. The reading accuracy of the low-power RF reader 81 on the fourth bracket 56 is very high. The high-power RF reader 81 on the third bracket 55 has a large RF range and may read the electronic tags 82 of all the cold-pressed material rolls on the second winding reel 52. The RF code read by the RF reader 81 on the fourth bracket 56 can be first eliminated from the RF code read by the RF reader 81 on the third bracket 55, and then the RF code with the strongest RF signal is selected from the remaining RF codes as the RF code of the cold-pressed material roll. In this way, the two radio frequency readers 81 on the third bracket 55 and the fourth bracket 56 can accurately read the radio frequency code of each cold-pressed material roll on the second winding reel 52 .

[0163] The strongest RF signal can be obtained by reading the RF signal once every certain time interval through the RF reader 81. After the preset time interval, the RF code with the most reading times is selected from all the RF codes read as the RF code with the strongest RF signal.

[0164] In some embodiments of the present application, the radio frequency reader 81 mounted on the second bracket 53 is used to read the electronic tag 82 in the coating material roll on the first unwinding reel 51 and transmit the read coating radio frequency data to the programmable controller included in the cold pressing device 5;

[0165] The radio frequency reader 81 mounted on the third bracket 55 and the fourth bracket 56 is used to read the electronic tag 82 in the cold pressing material roll on the second winding reel 52 and transmit the read cold pressing radio frequency data to the programmable controller included in the cold pressing device 5;

[0166] The programmable controller of the cold pressing device 5 is used to transmit the coating radio frequency data and the cold pressing radio frequency data to the cold pressing host computer 4;

[0167] The cold pressing host computer 4 is used to determine the RF code of the coated material roll on the first unwinding reel 51 based on the coating RF data; and to determine the RF code of the cold pressing material roll based on the cold pressing RF data; and transmit the RF code of the coated material roll and the RF code of the cold pressing material roll to the manufacturing execution system 1.

[0168] In the cold pressing process, the electronic tag 82 on the unwound coated material roll can be automatically read by the radio frequency reader 81 at the cold pressing unwinding position, and the electronic tag 82 on the rewound cold pressing material roll can be automatically read by the radio frequency reader 81 at the cold pressing rewinding position. The read data is automatically uploaded to the cold pressing host computer 4 via the programmable controller in the cold pressing device 5. The cold pressing host computer 4 filters out the radio frequency code of the unwound coated material roll from the read coating radio frequency data, and filters out the radio frequency code of each rewound cold pressing material roll from the cold pressing radio frequency data, and uploads them to the manufacturing execution system 1. The entire process does not require human intervention, and automatically identifies and uploads the radio frequency codes of multiple reels unwound and rewound in the cold pressing process, which helps the manufacturing execution system 1 to record the reels based on the radio frequency codes of the reels, and ensures that the physical reels in the cold pressing process are consistent with the records of the manufacturing execution system 1.

[0169] In some embodiments of the present application, the cold pressing host computer 4 is used to obtain the RF code with the largest signal strength from the cold pressing RF data transmitted by the RF reader 81 on the fourth bracket 56, as the RF code of the first cold pressing material roll on the second winding reel 52 close to the fourth bracket 56; and to eliminate the RF code of the first cold pressing material roll from the cold pressing RF data transmitted by the RF reader 81 on the third bracket 55, and obtain the RF code with the largest signal strength from the remaining cold pressing RF data, as the RF code of the second cold pressing material roll on the second winding reel 52 close to the third bracket 55.

[0170] Because multiple cold-pressed rolls are cut during the cold-pressing process, a second winding reel 52 may be fitted with multiple cold-pressed rolls. Therefore, the RF reader 81 on the second winding reel 52 may need to read the electronic tags 82 of multiple cold-pressed rolls. An RF reader 81 is positioned on each side of the second winding reel 52. The RF reader 81 on the fourth bracket 56 is closer to the cold-pressed rolls and has relatively low power, resulting in a smaller RF range. This facilitates reading the electronic tags 82 of cold-pressed rolls closer to the RF reader 81 and reduces interference from the electronic tags of cold-pressed rolls farther away. The RF reader 81 on the third bracket 55 has a larger RF range and may read the electronic tags 82 of all cold-pressed rolls on the second winding reel 52. The RF code read by the RF reader 81 on the third bracket 55 is first removed from the RF codes read by the RF reader 81. Then, the RF code with the strongest RF signal is selected from the remaining RF codes. In this way, the radio frequency code of each cold-pressed material roll on the second winding reel can be accurately read.

[0171] In some embodiments of the present application, as shown in Figure 4, the die-cutting device 7 includes a second unwinding reel 71 for installing a cold-pressed material roll, a third winding reel 72 for installing a die-cutting material roll, a fifth bracket 73, a sixth bracket 74, a second support plate 75, a first fixed rod 76 and a second fixed rod 77; one end of the second unwinding reel 71, one end of the third winding reel 72, one end of the first fixed rod 76 and one end of the second fixed rod 77 are all mounted on the first side surface of the second support plate 75; one end of the fifth bracket 73 is mounted on the first fixed rod 76, and the other end of the fifth bracket 73 is mounted with a radio frequency reader 81, the radio frequency range of which covers the second unwinding reel 71; one end of the sixth bracket 74 is mounted on the second fixed rod 77, and the other end of the sixth bracket 77 is mounted with a radio frequency reader 81, the radio frequency range of which covers the third winding reel 72.

[0172] Radio frequency readers 81 are provided at the unwinding and rewinding positions of the die-cutting device 7 to automatically identify the radio frequency code of the cold-pressed material roll used in the die-cutting process and the radio frequency code of the die-cutting material roll generated, thereby enabling the film roll number of the die-cutting process recorded in the manufacturing execution system 1 to correspond to the automatically identified radio frequency code, thereby ensuring that the actual material roll in the die-cutting process is consistent with the record of the manufacturing execution system 1.

[0173] In some embodiments of the present application, the radio frequency reader 81 mounted on the fifth bracket 73 is used to read the electronic tag 82 in the cold-pressed material roll on the second unwinding reel 71 and transmit the read cold-pressing radio frequency data to the programmable controller included in the die-cutting device 7; the radio frequency reader 81 mounted on the sixth bracket 74 is used to read the electronic tag 82 in the die-cutting material roll on the third rewinding reel 72 and transmit the read die-cutting radio frequency data to the programmable controller included in the die-cutting device 7;

[0174] The programmable controller of the die-cutting device 7 is used to transmit the cold pressing radio frequency data and the die-cutting radio frequency data to the die-cutting host computer 6;

[0175] The die-cutting host computer 6 is used to determine the radio frequency code of the cold-pressed material roll on the second unwinding reel 71 based on the cold-pressing radio frequency data; and to determine the radio frequency code of the die-cutting material roll based on the die-cutting radio frequency data; and transmit the radio frequency code of the cold-pressed material roll and the radio frequency code of the die-cutting material roll to the manufacturing execution system 1.

[0176] The radio frequency data read by the radio frequency reader 81 in the die-cutting device 7 is transmitted to the die-cutting host computer 6 through the programmable controller in the die-cutting device 7. The die-cutting host computer 6 determines the radio frequency code of the corresponding material roll based on the received radio frequency data, and then uploads the determined radio frequency code to the manufacturing execution system 1. This realizes the automatic recognition and upload of the radio frequency codes of the material rolls at the unwinding and rewinding positions in the die-cutting process, so that the accounts of the material rolls in the die-cutting process recorded by the manufacturing execution system 1 are consistent with the actual material rolls, which helps to accurately trace the data and materials of the die-cutting process in the subsequent data tracing process. In addition, the relevant operations of the die-cutting process are handled by the die-cutting device 7 and its corresponding die-cutting host computer 6. Even if there is an abnormality in the die-cutting process, it will not affect the normal operation of other processes such as the coating process and the cold pressing process.

[0177] In some embodiments of the present application, the RF reader / writer 81 in the die-cutting device 7 is used to perform multiple reading operations during the die-cutting process, and upload the multiple read RF data to the die-cutting host computer 6 through the programmable controller of the die-cutting device 7; the die-cutting host computer 6 is used to select the RF code that is read the most times from the multiple read RF data uploaded by each RF reader / writer 81 in the die-cutting device 7 as the final identified RF code.

[0178] In the die-cutting device 7, a cold-pressed roll is placed on the second unwinding reel 71, and a die-cutting roll is placed on the third winding reel 72. During the die-cutting process, a cold-pressed roll is cut into at least two die-cutting rolls, so multiple die-cutting rolls can be placed on the third winding reel 72.

[0179] Compared to other production devices, the die-cutting device 7 is unique in that it contains many metal parts. Radio frequency signals will be reflected on the metal surface, resulting in a relatively chaotic propagation direction of the radio frequency signal in the die-cutting device 7, which makes the radio frequency reader 81 prone to reading errors. Based on this, the embodiment of the present application is equipped with at least one radio frequency reader 81 on both the second unwinding reel 71 and the third winding reel 72, and these radio frequency readers 81 are configured to read periodically during the execution of the entire die-cutting process, thereby obtaining multiple reading results. The radio frequency code with the strongest radio frequency signal is selected from these multiple reading results, which can effectively improve the accuracy of radio frequency identification in the die-cutting process.

[0180] In some embodiments of the present application, a plurality of electronic tags 82 are installed on the inner wall of the roll, and the data stored in each electronic tag 82 includes the radio frequency code of the material roll and the identification of the electronic tag 82, and the character string of the preset digits is the radio frequency code of the material roll; a part of the multiple electronic tags 82 are installed at one end of the inner wall of the roll, and another part of the multiple electronic tags 82 are installed at the other end of the inner wall of the roll.

[0181] One or more electronic tags 82 can be set in the rolls of the above-mentioned coated material rolls, cold-pressed material rolls and die-cut material rolls. In the case of setting multiple electronic tags 82, these multiple electronic tags 82 can be set on the inner wall of the roll in the above-mentioned manner.

[0182] Multiple electronic tags can be evenly spaced on the inner wall of the roll. Installing multiple electronic tags 82 on the inner wall of the roll increases the probability that the roll's electronic tag 82 will be within the radio frequency range of the RFID reader 81, thereby increasing the probability that the RFID reader 81 will successfully read the roll's electronic tag 82. This is especially true for wider coated rolls, as installing multiple electronic tags 82 can reduce the likelihood of RFID failures.

[0183] Because the electronic tag 82 is mounted on the inner wall of the roll, the angle between the electronic tag 82 and the RF reader 81 cannot remain constant as the roll rotates, which may affect the reading effect. Based on this, in some embodiments, the electronic tag 82 can be an omnidirectional electronic tag 82. The omnidirectional electronic tag 82 can support reading by the RF reader 81 in all directions, has strong anti-interference capabilities, and can effectively improve the reading accuracy of the RF code of the roll.

[0184] In some embodiments of the present application, as shown in Figure 5, the radio frequency identification system 8 also includes a mounting member 83, which includes a main body 831, a spring piece 832 formed on the main body 831, and a fixing member 833; one side of the main body 831 is an arc surface, and a card slot 834 is provided on the other side. The electronic tag 82 is inserted into the card slot 834, and the spring piece 832 contacts the electronic tag 82 to press the electronic tag 82; the fixing member 833 is used to fix the mounting member 83 on the inner wall of the reel, and the arc surface contacts the inner wall of the reel.

[0185] The fixing member 833 may be provided with a hole through which a bolt is passed, and a nut and bolt are used to secure the fixing member 83 to the inner wall of the drum. Alternatively, the fixing member 83 may be secured to the inner wall of the drum using screws. Alternatively, the fixing member 83 may be secured to the inner wall of the drum using adhesive.

[0186] The radian of the above-mentioned cambered surface can be determined based on the radian of the inner wall of the reel. The radian of the cambered surface is adapted to the radian of the inner wall of the reel, so that when the mounting member 83 is fixed on the inner wall of the reel, the cambered surface can fit the inner wall of the reel.

[0187] The electronic tag 82 can be firmly mounted on the reel of the material roll by means of the mounting member 83 , so that the electronic tag 82 is not easily loosened or fallen off, and the electronic tag 82 can be easily disassembled or replaced.

[0188] In some embodiments of the present application, as shown in FIG6 , the coating device 3 , the cold pressing device 5 , and the die-cutting device 7 each include a switch 9 and a programmable controller 10 ; the electrode production system further includes a workshop logistics and radio frequency middleware system 11 , an automatic guided vehicle system 12 , and a warehouse management system 13 ;

[0189] In the coating device 3, the cold pressing device 5 and the die-cutting device 7, the radio frequency reader 81 in each device is connected to the programmable controller 10 through the switch 9;

[0190] The programmable controller 10 of the coating device 3 is connected to the coating host computer 2, the programmable logic controller 10 of the cold pressing device 5 is connected to the cold pressing host computer 4, and the programmable logic controller 10 of the die-cutting device 7 is connected to the die-cutting host computer 6;

[0191] The manufacturing execution system 1, the workshop logistics and radio frequency middleware system 11, the automatic guided vehicle system 12, and the warehouse management system 13 are all connected to the coating host computer 2, the cold pressing host computer 4, and the die-cutting host computer 6 through the local area network.

[0192] The workshop logistics and RF middleware system 11 is used to coordinate with various host computers to manage the automated handling of various materials in various processes within the factory workshop and to enable the sharing of computing resources and network communications between the RFID software in different host computers and the server. The automated guided vehicle system 12 communicates with the host computers to control and manage the automated guided vehicles within the factory workshop. The warehouse management system 13 communicates with the host computers to manage the storage of various materials within the factory workshop.

[0193] The number of RF readers 81 in the coating device 3, the cold pressing device 5, and the die-cutting device 7 can be one or more, and the RF readers 81 in each device are respectively connected to the switch 9 in the respective device. The RF readers 81, the switch 9, and the programmable controller 10 in the same device can communicate through the device's internal local area network or through wireless means such as WiFi or Bluetooth. The programmable controller 10 can include a PLC (Programmable Logic Controller).

[0194] In some embodiments of the present application, the coating device 3, the cold pressing device 5, and the die-cutting device 7 in the electrode production system can be one or more. Each device has its own corresponding host computer. This equipment deployment method can be called distributed deployment. The host computer of each device can use dual network cards. The host computer and the radio frequency reader 81 and programmable controller 10 in the corresponding device form a first local area network through the switch 9, and the host computer communicates with the manufacturing execution system 1, the inter-logistics and radio frequency middleware system 11, the automatic guided vehicle system 12, and the warehouse management system 13 through the second local area network. The use of distributed deployment can reduce the coupling of the system. When a single device encounters a problem, it can ensure the normal operation of other devices and reduce the pressure on the manufacturing execution system 1. The radio frequency reader 81 communicates with the programmable controller 10 in the device through the switch 9, so that the radio frequency code of the automatically identified material roll is uploaded to the host computer through the programmable controller 10, and then uploaded to the manufacturing execution system 1 through the host computer, thereby improving the operating efficiency of the entire electrode production system.

[0195] Realizing communication between the host computer and the manufacturing execution system 1, the workshop logistics and radio frequency middleware system 11, the automatic guided vehicle system 12 and the warehouse management system 13 in the second local area network helps to realize the automatic flow of information in the coating, cold pressing, die-cutting and other processes of electrode production, and improve the degree of automation of electrode production.

[0196] In some embodiments of the present application, the die-cutting roll produced by the die-cutting process can be transported to the warehouse by an automatic conveyor and stored at a certain location in the warehouse. The warehouse management system 13 identifies the storage location information of the die-cutting roll, or receives the storage location information uploaded manually, and stores the storage location information in the film roll information of the die-cutting film roll number corresponding to the die-cutting roll. In the winding and loading process of producing battery cells, the winding device will automatically call the material from the warehouse, and the die-cutting roll will be transported to the winding device by an automatic conveyor. The operator will install the die-cutting roll on the unwinding reel of the winding device. The unwinding reel can also be installed with a radio frequency reader 81 to automatically read the electronic tag 82 of the unwound die-cutting roll, and upload the read data to the winding host computer via the programmable controller in the winding device. The winding host computer selects the radio frequency code of the unwound die-cutting roll from the uploaded radio frequency data. The specific selection method can be the same as the selection method in any process such as the aforementioned coating process, cold pressing process or die-cutting process, and will not be repeated here.

[0197] After the winding host computer obtains the radio frequency code of the unwound die-cutting material roll, it obtains the corresponding die-cutting film roll number based on the radio frequency code, and deletes the information of the die-cutting material roll corresponding to the radio frequency code from the film roll information corresponding to the die-cutting film roll number to complete the material consumption processing of the die-cutting material roll.

[0198] A radio frequency reader 81 is also provided in the winding device, which realizes the automatic and accurate material consumption of the die-cutting material rolls used in the battery cell production process, improves the accuracy of the die-cutting related data, and helps to improve the accuracy of subsequent data traceability.

[0199] In the embodiment of the present application, the RFID system automatically identifies the RF code of the material roll and automatically uploads the RF code of the material roll to the manufacturing execution system. The manufacturing execution system establishes a mapping relationship between the RF code of the material roll and the film roll number, so that the RF code on the actual material roll accurately corresponds to the film roll number recorded in the manufacturing execution system, effectively improving the consistency between the actual material and the system records, and helping to improve the accuracy of subsequent data traceability. The entire electrode production process does not require manual affixing of barcodes on the material roll, which reduces the human intervention component in the electrode production process and improves the degree of automation of electrode production.

[0200] Some embodiments of the present application also provide a control method for a pole piece production system, which is applicable to the pole piece production system provided in any of the above embodiments. The description of the embodiment of the control method tends to emphasize the differences between the various embodiments of the above pole piece production system. The same or similar aspects can be referenced to each other, and for the sake of brevity, this article will not repeat them. Referring to Figure 7, the method specifically includes the following steps.

[0201] Step 101: In response to the coating rewinding signal, the RF reader at the rewinding reel of the coating process is controlled to read the RF code of the coating material roll from the electronic tag of the rewound coating material roll to generate the coating film roll number of the coating material roll.

[0202] Step 102: In response to the cold pressing unwinding signal, the radio frequency reader at the unwinding reel of the cold pressing process is controlled to read the radio frequency code of the unwound coating material roll from the electronic tag of the unwound coating material roll; based on the radio frequency code of the unwound coating material roll, the corresponding coating film roll number is obtained; based on the obtained coating film roll number, the cold pressing film roll number is generated.

[0203] Step 103: In response to the cold pressing coiling signal, the radio frequency reader at the coiling reel of the cold pressing process is controlled to read the radio frequency code of the cold pressing material roll from the electronic tag of the coiled cold pressing material roll.

[0204] Step 104: In response to the die-cutting unwinding signal, control the radio frequency reader at the unwinding reel of the die-cutting process to read the radio frequency code of the unwound cold-pressed material roll from the electronic tag of the unwound cold-pressed material roll; obtain the corresponding cold-pressed film roll number based on the radio frequency code of the unwound cold-pressed material roll; and generate the die-cutting film roll number based on the obtained cold-pressed film roll number.

[0205] Step 105: In response to the die-cutting rewinding signal, the radio frequency reader at the rewinding reel of the die-cutting process is controlled to read the radio frequency code of the die-cutting material roll from the electronic tag of the rewound die-cutting material roll.

[0206] The execution entities of the embodiments of the present application may include but are not limited to a manufacturing execution system and a coating host computer, a cold pressing host computer, a die-cutting host computer, etc.

[0207] The coating process uses a coating device to evenly apply the slurry to the current collector and then dry it to form the positive and negative electrode sheets. The coating device produces a coating roll, which is the positive or negative electrode sheet wound on a reel. The coating rewind signal can be generated by a component in the coating device that triggers the signal. For example, the coating device includes an inflation button, which triggers the rewind signal when it is pressed.

[0208] In actual application scenarios, the programmable controller in the coating device detects the triggered coating winding signal and sends the coating winding signal to the coating host computer. After receiving the signal, the coating host computer sends a reading instruction to the radio frequency reader / writer set at the first winding reel in the coating device.

[0209] Specifically, the coating host computer first sends the read instruction to the programmable controller in the coating device, and the programmable controller sends the read instruction to the switch, which then forwards it to the radio frequency reader installed at the first winding reel. After receiving the read instruction, the radio frequency reader reads the electronic tag of the coating material roll installed on the first winding reel, and sends the read radio frequency data to the coating host computer via the switch and the programmable controller in sequence. The coating host computer filters out the radio frequency code of the coating material roll from the read radio frequency data, and then sends the radio frequency code to the manufacturing execution system. The manufacturing execution system generates the coating film roll number of the coating material roll. The coating film roll number is used to identify the film roll information corresponding to the coating material roll. The film roll information records the production volume, production time, material information of the current collector, material information of the slurry, coating thickness and other information of the coating material roll.

[0210] The cold pressing process involves further compacting the coated electrode sheet through a cold pressing device and continuously slitting the wider roll of electrode sheet into several narrow sheets of the desired width. This means that the wider coated roll is divided into multiple cold-pressed rolls of relatively smaller widths. The cold-press unwinding and rewinding signals can be generated by components within the cold-pressing device that trigger the unwinding and rewinding signals. For example, the cold-pressing device also includes an inflation button, which, when pressed, triggers the unwinding signal for the cold-pressing process.

[0211] A coating material roll is mounted on the first unwinding reel in the cold press unit. The operator triggers a cold press unwinding signal. The programmable controller of the cold press unit detects this signal and transmits it to the cold press host computer. Upon receiving this signal, the host computer sends a read command to a radio frequency reader / writer located on the first unwinding reel. After receiving this read command, the radio frequency reader / writer reads the electronic tag attached to the coating material roll mounted on the first unwinding reel and transmits the read radio frequency data to the host computer via the switch and programmable controller in the cold press unit. The host computer then filters the read radio frequency code of the unwound coating material roll from the RF data and transmits the code to the manufacturing execution system (MES). Based on this RF code, the MES obtains the coating film roll number corresponding to the RF code and generates a cold press film roll number based on the coating film roll number. The generated cold press film roll number may include the coating film roll number, or may contain some characters that are identical to those in the coating film roll number. The cold-pressed film roll number is used to identify the film roll information corresponding to the cold-pressed material roll produced in the cold-pressing process. The film roll information of the cold-pressed material roll records the production volume, production time, compaction density of the electrode, and size information of the electrode.

[0212] During the cold pressing process, a reel for winding the electrode sheet to produce the cold-pressed material coil is also installed on the second winding reel of the cold pressing device, and a cold-pressing rewinding signal is generated by the operator. The programmable controller of the cold pressing device detects this cold-pressing rewinding signal and sends it to the corresponding cold-pressing host computer of the cold pressing device. After receiving this signal, the cold-pressing host computer sends a read instruction to the radio frequency reader installed on the second winding reel. After receiving this read instruction, the radio frequency reader reads the electronic tag of the reel installed on the second winding reel and sends the read radio frequency data to the cold-pressing host computer via the switch and programmable controller in the cold pressing device. The cold-pressing host computer filters the read radio frequency data to identify the radio frequency code of the wound cold-pressed material coil and then sends the radio frequency code to the manufacturing execution system.

[0213] The die-cutting process involves punching the electrode sheets from the cold-pressed coils obtained in the cold-pressing process into multiple die-cut coils for subsequent processing. The die-cutting unwinding and rewinding signals can be generated by components within the die-cutting device that trigger the unwinding and rewinding signals. For example, the die-cutting device can include an air button or knob that triggers the rewinding signal during the die-cutting process when the button is pressed or the knob is rotated.

[0214] A cold-pressed film roll is mounted on the second unwinding reel in the die-cutting device, and an operator triggers a die-cutting unwinding signal. The programmable controller of the die-cutting device detects this signal and transmits it to the die-cutting host computer. Upon receiving this signal, the die-cutting host computer sends a read command to a radio frequency reader / writer located on the second unwinding reel. After receiving this read command, the radio frequency reader / writer reads the electronic tag attached to the cold-pressed film roll mounted on the second unwinding reel and transmits the read radio frequency data to the die-cutting host computer via a switch and programmable controller in the die-cutting device. The die-cutting host computer then filters the read radio frequency data to identify the radio frequency code of the unwound cold-pressed film roll and transmits the code to the manufacturing execution system. Based on this radio frequency code, the manufacturing execution system obtains the cold-pressed film roll number corresponding to the code and generates a die-cutting film roll number based on the cold-pressed film roll number. The generated die-cutting film roll number may include the cold-pressed film roll number, or may contain some characters that are identical to those in the cold-pressed film roll number. The die-cutting film roll number is used to identify the film roll information corresponding to the die-cutting material roll produced in the die-cutting process. The film roll information of the die-cutting material roll records the production volume, production time, electrode size information, etc. of the die-cutting material roll.

[0215] During the die-cutting process, a reel for winding the electrode sheet to produce the die-cutting material roll is installed on the die-cutting device's third rewinding reel. The operator triggers a die-cutting rewinding signal. The die-cutting device's programmable controller detects this signal and transmits it to the corresponding die-cutting host computer. Upon receiving this signal, the host computer sends a read instruction to the radio frequency reader / writer installed on the third rewinding reel. After receiving this read instruction, the radio frequency reader / writer reads the electronic tag on the reel mounted on the third rewinding reel and transmits the read radio frequency data to the host computer via the switch and programmable controller in the die-cutting device. The host computer then filters the read radio frequency data to identify the radio frequency code of the rewound die-cutting material and transmits the code to the manufacturing execution system.

[0216] During the rewinding process in the coating process, the unwinding and rewinding process in the cold pressing process, and the unwinding and rewinding process in the die-cutting process, the RF code of the material roll is automatically identified by the RF reader and the film roll number of each process is generated. This ensures that the RF code on the actual material roll accurately corresponds to the film roll number recorded by the system, effectively improving the consistency between the actual material and the system record, and helping to improve the accuracy of subsequent data traceability. The entire electrode production process does not require manual affixing of barcodes on the material roll, reducing the human intervention component of the electrode production process and improving the degree of automation of electrode production.

[0217] In some embodiments of the present application, in the coating process, the mapping relationship between the coating film roll number of the coated material roll obtained by winding and the radio frequency code is stored; in the cold pressing process, the mapping relationship between the radio frequency code of the unwound coating material roll, the cold pressing film roll number and the radio frequency code of the wound cold pressing material roll is stored; in the die-cutting process, the mapping relationship between the radio frequency code of the unwound cold pressing material roll, the die-cutting film roll number and the radio frequency code of the wound die-cutting material roll is stored.

[0218] In the coating process, cold pressing process, and die-cutting process, after the RF code of the material roll is automatically read by the RF reader, the mapping relationship between the RF code of the material roll in each process and the corresponding film roll number is also stored, so that the required data can be quickly traced based on these mapping relationships during the subsequent data tracing process. In addition, the mapping relationship stored in the cold pressing process associates the RF code of the coating material roll, the cold pressing film roll number, and the RF code of the produced cold pressing material roll. Based on this mapping relationship, the RF code of the coating material roll can be used to query the information of the cold pressing material roll slit from the coating material roll. The RF code and / or cold pressing film roll number of the cold pressing material roll can also be used to query which coating material roll the cold pressing material roll was slit from. Similarly, in the die-cutting process, the RF code of the cold-pressed roll, the die-cut film roll number, and the RF code of the rewound die-cut roll are linked. This allows the RF code of the cold-pressed roll to be used to query information about the die-cut rolls slit from the cold-pressed roll. Furthermore, the RF code and / or die-cut film roll number of the die-cut roll can be used to query which cold-pressed roll the die-cut roll was die-cut from. This allows the material flow relationship and information between the coating process, the cold-pressing process, and the die-cutting process to be traced, expanding the scope of data traceability during electrode production and improving traceability efficiency and accuracy.

[0219] During the coating process, multiple electronic tags are installed on the coating material roll; based on the data of the multiple electronic tags read, the number of electronic tags with the same preset number of digits is counted; and the character sequence of the preset number of digits is extracted from the data of the electronic tag with the largest number counted as the radio frequency code of the coating material roll.

[0220] Because the coating material rolls are large, the distance between the RFID reader and the electronic tags on them is long, and the distance between adjacent coating material rolls during the coating process is short, making cross-reading prone to occur. To improve reading accuracy, multiple electronic tags are installed on the inner wall of the coating material roll drum. These multiple electronic tags can be evenly distributed along the inner wall of the drum. Alternatively, half of the multiple electronic tags can be distributed at one end of the drum and the other half at the other end. For example, if there are six electronic tags in total, three can be distributed at the left end of the inner wall of the coating material roll drum and the other three at the right end. The three electronic tags at each end can be spaced 120 degrees apart.

[0221] The data stored in multiple electronic tags attached to the same roll of coated material has the same first preset digits, representing the RF code of the roll, while the last preset digits are different, identifying the specific electronic tag. The first preset digits can be the first 12 or 14 digits, while the last preset digits can be the last 2 or 3 digits. For example, suppose six electronic tags are attached to a roll of coated material. The first 12 digits of each tag are the same: A123B456C789, while the last two digits of each tag are different: 01, 02, 03, 04, 05, and 06, respectively.

[0222] Because multiple electronic tags are installed on the coating material roll and the distance between adjacent coating material rolls in the coating process is short, the RF reader at the first winding reel is likely to read data from multiple electronic tags. In this case, the number of electronic tags with the same number of pre-set digits is counted from the multiple RF codes read, and the character sequence with the first pre-set digits in the data of the electronic tag with the largest number is determined as the RF code of the coating material roll.

[0223] In the coating process, multiple electronic tags are set on the coating material roll. When the radio frequency reader reads multiple radio frequency codes, the radio frequency code read the most times is taken as the radio frequency code of the coating material roll, which can effectively improve the accuracy of identifying the radio frequency code of the coating material roll in the coating process.

[0224] The first unwinding reel of the cold pressing process is installed with a coating material roll. Therefore, the setting method of setting the radio frequency reader at the first unwinding reel and the method of determining the radio frequency coding of the coating material roll on the first unwinding reel based on the data read by the radio frequency reader can be the same as the corresponding methods in the above-mentioned coating process and will not be repeated here.

[0225] In some embodiments of the present application, a first RF reader and a second RF reader are respectively provided on both sides of the second winding reel of the cold pressing process, and the power of the first RF reader is greater than that of the second RF reader; the RF code with the strongest RF signal strength is selected from the RF codes read by the second RF reader as the RF code of the first cold-pressed material roll on the winding reel of the cold pressing process close to the second RF reader; the RF code of the first cold-pressed material roll is eliminated from the RF codes read by the first RF reader, and the RF code with the strongest RF signal strength is obtained from the remaining RF codes as the RF code of the second cold-pressed material roll on the winding reel of the cold pressing process close to the first RF reader.

[0226] Because multiple cold-pressed rolls are cut during the cold-pressing process, a second winding reel may be fitted with multiple cold-pressed rolls, such as two cold-pressed rolls. Therefore, the RF reader at the second winding reel may need to read the electronic tags of multiple cold-pressed rolls. A first RF reader and a second RF reader are positioned on either side of the second winding reel. The second RF reader is closer to the cold-pressed rolls and has relatively low power, resulting in a smaller RF range. This helps read the electronic tags of cold-pressed rolls closer to the second RF reader and reduces interference from the electronic tags of cold-pressed rolls farther away. The first RF reader, however, has a larger RF range and may read the electronic tags of all the cold-pressed rolls on the second winding reel. The RF code of the first cold-pressed roll identified by the second RF reader is first removed from the RF code read by the first RF reader. Then, the RF code with the strongest RF signal is selected from the remaining RF codes as the RF code of the second cold-pressed roll. In this way, the radio frequency code of each cold-pressed material roll on the second winding reel can be accurately read.

[0227] In some embodiments of the present application, an RF reader at the rewinding reel in the die-cutting process is controlled to read the electronic tag of the rewound die-cutting material multiple times, and the RF code read the most times is determined as the RF code of the die-cutting material. The RF reader at the unwinding reel in the die-cutting process can also perform multiple reading operations and select the RF code read the most times as the RF code of the unwound cold-pressed material.

[0228] The die-cutting process is to die-cut the cold-pressed material roll produced by the cold-pressing process, so the cold-pressed material roll is unwound in the die-cutting process, and the die-cut material roll is finally rewound after the die-cutting process. A cold-pressed material roll will be cut into at least two die-cutting material rolls. The die-cutting device contains many metal parts, and the radio frequency signal will be reflected on the metal surface, resulting in a relatively messy propagation direction of the radio frequency signal in the die-cutting device, which makes the radio frequency reader prone to reading errors. In the embodiment of the present application, the radio frequency reader will read multiple times during the execution of the entire die-cutting process, and select the radio frequency code with the strongest radio frequency signal from the results of multiple readings.

[0229] It can automatically identify the radio frequency code of the cold pressed material roll used in the die-cutting process and the radio frequency code of the generated die-cut material roll, and read and select the radio frequency code with the strongest radio frequency signal multiple times, thereby improving the reading accuracy of the die-cutting process.

[0230] In some embodiments of the present application, in the coating process, in response to the winding end signal triggered by the cutter, the first side coating production volume of the target coated material roll obtained by the current winding is obtained; the first side coating production volume is recorded in the film roll information corresponding to the coating film roll number of the target coated material roll; the first side data collection end instruction is received, and it is determined that the coating of the first side of the target coated material roll is completed; the coating device is controlled to perform a coating operation on the second side of the target coated material roll, the second side being the other side opposite to the first; the second side data collection end instruction triggered by the control panel is detected, and it is determined that the coating of the target coated material roll is completed.

[0231] In the coating process, it is usually necessary to coat the slurry on both sides of the current collector separately. When the slurry coating is completed on the first side, the current collector is cut by a cutter. The coating device detects the cutter action and determines that the winding end signal triggered by the cutter is detected. At this time, the programmable controller of the coating device obtains the number of meters of the target coating roll from the meter counter in the coating device and sends the number of meters to the coating host computer. The coating host computer calculates the product of the number of meters and the current collector width to obtain the first side coating production volume of the target coating roll. The coating host computer calls the cancellation interface of the manufacturing execution system, and based on the radio frequency code of the target coating roll read by the radio frequency identification, it queries the coating film roll number of the target coating roll and sets the status of the coating film roll number to be in queue. Then the coating host computer calls the adjustment first side quantity interface of the manufacturing execution system and uploads the first side coating production volume of the target coating roll to the manufacturing execution system.

[0232] After uploading the first-side coating production volume to the Manufacturing Execution System (MES), the coating host computer invokes the MES's first-side automatic start interface and changes the status of the target coating roll's coating film reel number to active. The operator then performs first-side data collection and material consumption operations through the MES's control panel. Specifically, the operator clicks the corresponding data collection and material consumption buttons on the control panel. After the MES detects the operator-triggered data collection and material consumption instructions, it records the first-side coating production volume in the film reel information corresponding to the target coating roll's coating film reel number and deducts the current collector quantity used to produce the target coating roll from the quantity used for the target coating roll. After data collection and material consumption are complete, the control panel displays a completion message. The operator clicks the data collection and material consumption button on the coating host computer's homepage. The RFID system detects the click, indicating that it has received the first-side data collection completion instruction and confirms that coating of the first side of the target coating roll is complete. After the first side is completed, the coating host computer automatically invokes the MES's second-side start interface and controls the coating device to perform coating operations on the second side of the target coating roll.

[0233] After the second side starts operation, the operator performs the second side data collection and material consumption operations through the control panel of the manufacturing execution system. After the operation is completed, the operator clicks the data collection and material consumption button on the system homepage of the coating host computer. The coating host computer detects that the button has been clicked, that is, it receives the second side data collection end instruction, determines that the second side is completed, and then determines that the coating of the target coating material roll is completed.

[0234] In the above method, the production volume of the coating material roll is automatically recorded in the coating process and recorded in the film roll information corresponding to the coating film roll number. After the first side is coated, the coating operation of the second side is automatically controlled. The entire process is automated, reducing manual intervention and improving the automation and coating efficiency of the coating process.

[0235] In some embodiments of the present application, in the cold pressing process, the winding end signal of the last split winding corresponding to the currently unwound coating material roll is detected, and the current account quantity corresponding to the currently unwound coating material roll is obtained; the ratio of the current account quantity to the number of rolls of each target cold pressed material roll is calculated, and the ratio is used as the account production of each target cold pressed material roll, and the account production of each target cold pressed material roll is stored in the film roll information of the cold pressed film roll number corresponding to each target cold pressed material roll.

[0236] Coated film rolls are large and are slit into multiple smaller rolls during the cold pressing process. A single coated film roll may need to undergo one or more cold pressing processes to be split into multiple rolls. When a coated film roll undergoes multiple cold pressing processes, the actual production volume of the resulting rolls is determined based on the meter count of the rolls in each cold pressing process before the final one. This actual production volume is recorded in the roll information corresponding to the cold pressing film roll number.

[0237] When the coated material roll is subjected to only one cold pressing process, or in the last cold pressing process among multiple cold pressing processes, after the cold pressing device finishes winding, the operator clicks the unloading confirmation button in the human-machine interface of the cold pressing device. The programmable controller of the cold pressing device detects that the button has been clicked, determines that the winding end signal of the last split winding has been received, and transmits the winding end signal to the cold pressing host computer. After receiving the signal, the cold pressing host computer calls the manufacturing execution system's account quantity acquisition interface to obtain the current account quantity of the unwound coated material roll. The current account quantity is the remaining account quantity of the coated material roll after the consumption of the previous cold pressing processes.

[0238] During the final cold press process, the cold press rolls are split according to the current account quantity of the coated roll. For example, if the current account quantity of the coated roll during the final cold press process is 600 EA and it is split into three cold press rolls, the account production quantity of each of these three rolls is 200 EA.

[0239] In the cold pressing process, based on the current account number of the unwound coated material roll, the production volume of each cold pressed material roll obtained by the last split reel is automatically calculated, thereby improving the accuracy of the production volume record of the cold pressed material roll.

[0240] In some embodiments of the present application, in response to the winding end signal of the last split winding, the current physical quantity corresponding to the currently unwound coating material roll is obtained; when the current account quantity is less than the current physical quantity, in response to entering the die-cutting process, the actual production volume of each target cold-pressed material roll is calculated based on the current physical quantity and the number of rolls of each target cold-pressed material roll; in the film roll information corresponding to the die-cutting film roll number, the account production volume of each target cold-pressed material roll is modified to the actual production volume of each target cold-pressed material roll.

[0241] After the cold press host computer receives the winding end signal of the last split winding, it also obtains the number of meters of the unwound coated material roll measured by the meter meter from the programmable logic control of the cold press device, calculates the product between the number of meters and the width of the coated material roll, and obtains the current physical quantity of the unwound coated material roll. When the current account quantity is less than the current physical quantity, after the cold press roll is split according to the current account quantity, after entering the die-cutting process, based on the current physical quantity and the number of rolls of each target cold press roll, the actual production volume of each target cold press roll is calculated. In the film roll information corresponding to the die-cutting film roll number, the account production volume of each target cold press roll is respectively modified to the actual production volume of each target cold press roll, so that the account production volume of the unwound cold press roll in the die-cutting process is consistent with the actual situation, which helps to improve the consistency of the account and actual situation of the material roll in the die-cutting process.

[0242] In some embodiments of the present application, in response to the winding end signal in the die-cutting process, the current account quantity and the current physical quantity of the currently unrolled cold-pressed material roll are obtained; when the current physical quantity is less than or equal to the current account quantity, the first ratio between the current physical quantity and the number of rolls of each die-cutting material roll is calculated, and the first ratio is stored as the account production of each die-cutting material roll in the film roll information of the die-cutting film roll number corresponding to each die-cutting material roll; when the current physical quantity is greater than the current account quantity, the current account quantity of the currently unrolled cold-pressed material roll recorded by the system is modified to the current physical quantity, and the second ratio between the modified current account quantity and the number of rolls of each die-cutting material roll is calculated, and the second ratio is stored as the account production of each die-cutting material roll in the film roll information of the die-cutting film roll number corresponding to each die-cutting material roll.

[0243] After the programmable controller in the die-cutting device detects the rewinding end signal, it transmits the signal to the die-cutting host computer. The die-cutting host computer then calls the interface of the manufacturing execution system to obtain the current account quantity of the unwound cold-pressed material roll. Furthermore, the die-cutting host computer obtains the number of meters of the unwound cold-pressed material roll measured by the meter counter from the programmable controller of the die-cutting device, calculates the product of this number of meters and the width of the cold-pressed material roll, and obtains the current physical quantity of the unwound cold-pressed material roll. If the current physical quantity is less than a first threshold or greater than a second threshold, it indicates an abnormality and the splitting operation is not performed. The rewound die-cutting material roll is subsequently manually inspected and processed. The first threshold can be 4EA or 5EA, etc., and the second threshold can be 350EA or 380EA, etc.

[0244] When the current physical quantity is greater than or equal to the first threshold and less than or equal to the second threshold, the current physical quantity of the unwound cold-pressed material roll is compared with the current account quantity. When the current physical quantity is less than or equal to the current account quantity, the die-cutting host computer calls the split completion interface of the manufacturing execution system to split the current physical quantity of the unwound cold-pressed material roll into the account production quantity of each die-cutting material roll, that is, calculate the first ratio between the current physical quantity and the number of rolls of each die-cutting material roll, and store the first ratio as the account production quantity of each die-cutting material roll in the film roll information of the die-cutting film roll number corresponding to each die-cutting material roll. If the current account quantity of the unwound cold-pressed material roll still remains after the split, the remaining account quantity will not be processed, and the remaining account quantity will be uniformly destroyed later.

[0245] When the current physical quantity is greater than the current account quantity, the die-cutting host computer calls the quantity adjustment interface of the manufacturing execution system to adjust the current account quantity of the cold-pressed material roll recorded by the manufacturing execution system to the current physical quantity, and then splits the current physical quantity into the account production quantity of each die-cutting material roll through the above method, and stores it in the film roll information corresponding to the die-cutting film roll number.

[0246] In the die-cutting process, the account production volume of the die-cutting roll is calculated based on the current physical quantity, so that the account growth volume of the die-cutting roll is closer to the actual production volume, and the accuracy of the account production volume of the die-cutting roll recorded in the die-cutting process is improved.

[0247] In some embodiments of the present application, the die-cutting roll produced by the die-cutting process can be transported to the warehouse by an automatic conveyor and stored at a certain location in the warehouse. The warehouse management system identifies the storage location information of the die-cutting roll, or receives the storage location information uploaded manually, and stores the storage location information in the film roll information of the die-cutting film roll number corresponding to the die-cutting roll. In the winding and loading process of producing battery cells, the winding device will automatically call the material from the warehouse, and the die-cutting roll will be transported to the winding device by an automatic conveyor. The operator will install the die-cutting roll on the unwinding reel of the winding device. The unwinding reel can also be equipped with a radio frequency reader to automatically read the electronic tag of the unwound die-cutting roll, and upload the read data to the winding host computer corresponding to the winding device via the programmable controller in the winding device. The winding host computer selects the radio frequency code of the unwound die-cutting roll from the uploaded radio frequency data. The specific selection method can be the same as the selection method in any process such as the aforementioned coating process, cold pressing process or die-cutting process, and will not be repeated here.

[0248] After the winding host computer obtains the radio frequency code of the unwound die-cutting material roll, it obtains the corresponding die-cutting film roll number based on the radio frequency code, and deletes the information of the die-cutting material roll corresponding to the radio frequency code from the film roll information corresponding to the die-cutting film roll number to complete the material consumption processing of the die-cutting material roll.

[0249] A radio frequency reader is also installed in the winding device to realize the automatic and accurate material consumption of the die-cutting material rolls used in the battery cell production process, improve the accuracy of die-cutting related data, and help improve the accuracy of subsequent data traceability.

[0250] In the embodiment of the present application, in one or more processes such as the coating process, cold pressing process, and die-cutting process of the electrode production, the RF code of the material roll can be automatically identified, and the mapping relationship between the RF code of the material roll and the film roll number can be automatically stored, so that the RF code on the actual material roll accurately corresponds to the film roll number recorded in the system, effectively improving the consistency between the actual material and the system record, and helping to improve the accuracy of subsequent data traceability. The entire electrode production process does not require manual affixing of barcodes on the material roll, which reduces the human intervention component in the electrode production process and improves the degree of automation of electrode production.

[0251] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0252] In order to facilitate the understanding of the electrode production system and control method provided by the embodiment of the present application, an example is given below. In this example, in the electrode production process, RF readers are provided at the coating and winding, cold pressing and unwinding, cold pressing and winding, die-cutting and unwinding, and other positions. The RF reader automatically reads the RF code of the roll at the corresponding position, and uploads the read RF code to the manufacturing execution system, as shown in Figure 8. The entire process shown in Figure 8 includes coating and winding, cold pressing and unwinding, die-cutting and unwinding, vertical storage, and winding and loading, so that the system can accurately trace the process from winding the finished product to coating and producing the coated roll. Automatic loading

[0253] The network architecture based on the electrode production system and its control method is shown in Figure 9. The network architecture includes a factory-level local area network. Among them, the manufacturing execution system (MES as shown in Figure 9), the workshop logistics and RFID middleware system, the AGVS (Automated Guided Vehicle System), the warehouse management system (WMS), at least one production equipment, and the host computer corresponding to each production equipment are connected through the above-mentioned factory-level local area network.

[0254] The at least one production device includes a coating device, a cold press, a die-cutting device, and the like. The host computer corresponding to the production device is installed with the RFID identification system's aggregation layer software, which is used to control all RFID readers within the production device and process the data read by the RFID readers. The production device includes multiple RFID readers, switches, programmable logic controllers (PLCs), and other devices within the production device (such as various sensors). These devices within the production device communicate via the device's internal local area network.

[0255] In some embodiments, the host computer corresponding to the production device uses dual network cards, one of which is connected to the PLC in the production device, and the other is connected to the MES. Different production devices can correspond to different host computers respectively. Such a distributed deployment method can reduce the coupling of the system. When problems occur in individual production devices, it will not affect the normal operation of other production equipment. It can also reduce the pressure on the host computer and improve the stability of the system.

[0256] Based on the schematic diagram of the electrode production process shown in Figure 8 and the network architecture schematic diagram shown in Figure 9, the production processes of the coating process, cold pressing process and die-cutting process are described below. The RFID system mentioned in the production process of each process refers to the radio frequency identification system software installed in the host computer corresponding to the production equipment of each process, such as the radio frequency identification system software installed in the coating host computer.

[0257] 1. Coating process

[0258] 1) Work order warning settings

[0259] The operator can use the RFID system to set the pre-alarm quantity for the currently used work order. When the RFID system obtains the coating film roll number, it will determine the work order corresponding to the coating film roll number. If the number of work orders is less than the pre-alarm quantity, the RFID system will issue an alarm and prompt that the work order must be changed before the coating film roll number can be obtained. The pre-alarm quantity of the work order can be the minimum square meters required to produce the coated electrode.

[0260] 2) Loading at the reeling position

[0261] The roll with the RFID tag is placed in the reeling position of the coating unit. The operator presses the inflation button to trigger the "reel tightening" signal, and the roll automatically rotates slowly at a speed of 5m / min for 15 seconds. The RFID system reads the RFID tag on the roll using the "tightening signal" triggered by the PLC. After successful reading, the MES system checks to see if the current work order quantity exceeds the work order quantity set by the RFID system. If it does, an RFID alarm is triggered, prompting the operator to change the work order. After the change is completed, the roll is tightened and read again, and the MES interface is called to obtain the module roll number.

[0262] If the current work order quantity exceeds the work order number set by the RFID system, the RFID system obtains the coating film roll number by calling the MES coating work order issuance interface and writes the film roll number and the RFID-recognized radio frequency code to the PLC address. The PLC program displays the film roll number and radio frequency code at the corresponding position on the human-machine interface of the host computer. At the same time, the RFID system writes the turret enable signal. If the reading fails, the RFID system writes an alarm instruction to the PLC address, and the PLC triggers the coating machine alarm and automatically deflates. The operator can trigger the loading operation again by pressing the inflation button.

[0263] 3) Start of the rewinding position

[0264] After the equipment is turned on and runs for five meters, it triggers a signal to start reeling. Based on this signal, the RFID system unbinds the SFC (Shop Floor Control) information bound to the current reel through the MES interface.

[0265] 4) Unloading at the reeling position

[0266] When the equipment reaches the turret production condition, unloading is automatically prohibited, the operator is not allowed to automatically change the roll, and the material is directly deflated and unloaded after the cutting is completed.

[0267] 5) Automatic completion

[0268] After the equipment is finished, the operator uses the automatic roll-changing function to complete the cutter operation. After the cutter is completed, the "rewinding end" signal is triggered (this signal is given at the moment the cutter cuts, and the rising edge is set only once). At the same time, the number of meters produced by the roll is recorded in the PLC address. After receiving the PLC's "rewinding end" signal, the RFID system performs the completion operation. After the RFID system completes the process, it writes a signal to the PLC to allow unloading (the unloading prohibition signal is cleared to 0). The operator can then unload the material normally and print the shipping tag. The completion operation is as follows:

[0269] After receiving the "End of Rewind" signal, the RFID system reads the rewind meter count from the PLC address and converts it into an EA value based on the material type. The RFID system automatically calls the MES deregistration interface to change the film roll status to "Queued." Upon successful deregistration, the RFID system automatically calls the MES "Adjust Side A Quantity" interface to upload the rewind EA to the MES system. After successfully adjusting Side A's quantity, the RFID system automatically calls the MES "Auto-Start Side A" interface to change the film roll status to "Active." After successfully calling the "Auto-Start Side A" interface, the operator must collect data and determine material consumption through the MES panel. After completing data collection and material consumption, click the "Collect Data and Material Consumption" button on the RFID system homepage. The RFID system automatically completes Side A. After Side A is completed, the RFID system automatically calls the "Start Side B" interface to start Side B. After Side B starts, the operator collects data and determines material consumption through the MES panel. Upon completion, click the "Collect Data and Material Consumption" button on the RFID system homepage. The RFID system automatically completes Side B. The completion process ends with Side B.

[0270] 2. Cold pressing process

[0271] 1) Unwinding position loading

[0272] The operator places incoming material, bearing an RFID tag, at the unwinding position. After transferring and posting the material through the MES panel, the operator proceeds to load the material. The operator presses the inflation button to trigger the "unwind and tighten" signal, which automatically slows the roll at 15 m / min for 15 seconds. Based on the "unwind and tighten" signal triggered by the PLC, the RFID system reads the RFID tag on the roll. Upon successful read, the cold-pressed film roll number is obtained through MES interaction and written to the PLC address. The PLC program displays the roll number at the corresponding location on the human-machine interface, and the RFID system simultaneously writes a loading OK signal.

[0273] If a read or loading operation fails, the RFID system simply writes an alarm command to the PLC address. The PLC then issues a machine alarm and automatically deflates the airbag. The operator can then press the refill button to trigger loading again. If the PLC program does not receive an OK signal from the RFID system before the reel stops rotating, it automatically issues an alarm and deflates the airbag.

[0274] The RFID system determines whether the film roll number at the reeling position is consistent based on the film roll number obtained during loading. If they are different, a "reel closing alarm" signal is written. The PLC program starts recording the number of meters after the machine is turned on. When the number of meters exceeds the set value and production continues, the equipment triggers the reel closing alarm for the corresponding production and stops the machine. The alarm can only be reset after receiving the unloading OK signal. It will not be reset and the machine will not be turned on in other cases.

[0275] 2) End of unwinding

[0276] When the equipment unwinds and reaches the roll diameter warning alarm, the "unwinding end" signal is triggered. The RFID system records the production information and selects the last roll of material by judging the status of the reel.

[0277] 3) Loading at the reeling position

[0278] The operator places an empty roll with an RFID tag in the reeling position and begins the reeling and loading process. The operator triggers the "reel tightening" signal using the inflation button / knob, and the machine automatically slows down at 5 m / min for 15 seconds. The RFID system, triggered by the "reel tightening" signal from the PLC, reads the RFID tag on the reel. If the read is successful, the RFID system writes an OK signal and unbinds the reel's historical binding information through the MES interface. If the read fails, the RFID system issues an alarm.

[0279] If the PLC program does not receive an OK signal from the RFID system before the reel stops rotating, it will automatically alarm and deflate. If the reel has traveled more than 60 meters, the PLC program will copy the unwinding film roll number written by the RFID system to the rewinding address and display it on the human-machine interface. If the feed reel's roll diameter exceeds the preset value, the air inflation action will not be activated and the tensioning signal will not be triggered. If the reel has traveled more than 60 meters, the equipment will remain inflated, and the operator is prohibited from directly defusing the air by pressing the inflation button after rewinding.

[0280] 4) Unloading at the reeling position

[0281] After the equipment finishes winding, the PLC program writes the EA value of the roll into the address of the corresponding winding shaft and displays it on the human-machine interface. The operator clicks the "Unloading Confirmation" button of the corresponding winding shaft through the human-machine interface to trigger the "End of Winding" button. After receiving the "End of Winding" signal, the RFID system writes a prohibition signal for unloading to the PLC address, reads the EA data of the corresponding winding shaft, performs the completion and splitting operation, and then sends the unloading OK signal and the unloading permission signal. The PLC program controls the inflation and deflation. After obtaining the winding end signal, the RFID system reads the EA value in the PLC address and calls the MES splitting completion interface to perform the splitting completion operation. When it is not the last roll to be split, the RFID system completes the splitting according to the actual EA quantity. When splitting to the last roll, the RFID system first calls the MES to obtain the account quantity interface to obtain the account quantity of the unrolled material.

[0282] When the MES account quantity is less than the actual quantity, the RFID system splits the account quantity according to the account quantity. After the split is completed, the die-cutting process operation number is used (after the split is completed, the MES account automatically enters the die-cutting process) to adjust the split MES account quantity to the actual quantity. When the MES account quantity is greater than the actual quantity, the RFID system splits the MES account and consumes all the accounts. When the actual quantity exceeds 700, the split completion process is not executed and the material is directly discharged. The RFID system issues an exception alarm instruction when an abnormality occurs during the completion operation. If it is an MES abnormality, it issues an MES exception code, which the PLC program displays in a pop-up window on the human-machine interface.

[0283] When the reel is in production state, it is not allowed to trigger the "unloading confirmation" button. The rear reel can only be triggered after the current reel receives the unloading OK signal. Direct triggering of the rear reel is not allowed. When the reel is completed and the splitting and completion operation cannot be performed, the operator can trigger the "abnormal unloading" signal through the "abnormal unloading" button on the human-machine interface. After receiving the signal, the RFID system writes unloading OK and allows unloading. According to the MES interface, the weight characteristic data and production process data of the current material are obtained, and the MES splitting interface (only splitting but not completion) is called first to obtain the split film roll number. Then, the data is uploaded and bound to the film roll number through the MES upload and completion interface and the completion processing is performed.

[0284] 3. Die-cutting process

[0285] 1) Unwinding position loading

[0286] The operator places incoming material with an RFID tag on the unwinding position, presses the inflation button to trigger the "unwind tensioning" signal, and automatically slows down the roll at a speed of 15m / min for 15 seconds. The RFID system uses the "unwind tensioning" signal triggered by the PLC to read the RFID tag on the roll. After a successful read, the MES automatic accounting interface is called to perform die-cutting and loading operations. After the accounting interface is successfully called, a scan result is sent to the PLC. If the read fails or the loading operation fails, the RFID system writes an alarm instruction and scan result to the PLC address. The PLC issues a machine alarm, and the operator can trigger the loading operation again by pressing the inflation button.

[0287] 2) Start unwinding

[0288] The device gives a signal to start unwinding. After the RFID system obtains the "unwinding start" signal, it writes the "unloading prohibited" signal to the PLC address. The device will keep inflating until the unwinding is completed and the "unloading allowed" signal from the RFID system is obtained.

[0289] 3) End of unwinding

[0290] When the equipment decelerates near the end of the unwinding position, it triggers the "unwinding position end" signal. The RFID system receives this signal and issues a "material unloading permission" signal, simultaneously generating production information for the roll. The system then obtains the current reel status, marks the last reel based on the reel status, and marks the lower reel as the last reel split from the current roll.

[0291] 4) Loading at the reeling position

[0292] The operator places an empty roll with an RFID tag in the rewinding position, activates the "rewind tensioning" signal by pressing the inflation button / knob, and manually rotates the roll to bring the RFID tag within read range. Upon successful read, the RFID system writes an OK signal. If the read fails, the RFID system writes an alarm command and the reading result, and the PLC triggers a machine alarm. The operator can then trigger the reloading operation by pressing the inflation button. Tags with fewer than three reads are filtered out during the rewinding tensioning reading.

[0293] 5) Start of the rewinding position

[0294] The device triggers the "rewinding position start" signal. After the RFID system receives the "rewinding start signal," it obtains the film roll number bound to the current roll through the MES RFID binding information interface. If the roll already has a bound film roll number, it unbinds the film roll number through the MES unbinding interface. At the same time, after receiving the "rewinding start signal," the RFID system writes a "prohibit unloading" signal to the corresponding reel address. The device must remain inflated until the rewinding is completed. Manual deflation can only be performed when the RFID system gives the permission to unload signal.

[0295] 6) The winding position ends

[0296] When the equipment replaces the new material at the unwinding position and re-tapes the tape, the yellow glue joint automatically triggers the "rewinding end" signal when it reaches the rewinding position. The operator can also manually trigger the "abnormal material removal" button on the corresponding rewinding spindle on the equipment host computer. After receiving the "rewinding end signal," the RFID system obtains the current rewinding EA value and number of marks through the PLC address and performs the splitting and completion operation through the MES interface. The RFID system performs a logical judgment based on the current EA value and obtains the account quantity of the material in the unwinding position (the material to be split) through the MES interface.

[0297] If the current EA is less than 5EA or greater than 350EA, no splitting is performed. If the current EA value is less than the MES account, the MES split completion interface is directly called to perform the split completion operation, and the remaining account is not processed. If the EA value is greater than the MES account, the RFID system first calls the MES adjustment quantity interface to adjust the MES account quantity to the actual quantity, and then splits and completes the product through the MES split completion interface. The RFID system will upload the last roll material tag marked at the end of unwinding to the MES during splitting.

[0298] After the RFID system successfully completes the unwinding process, it sends a "unwinding" signal to the PLC address, allowing the operator to unwind. If an exception occurs during the unwinding process, the operator can manually trigger the unwinding process by pressing the "unwinding" button on the device host computer. After the unwinding process is complete, the RFID system clears the system binding information, completing the winding process.

[0299] According to the MES interface, the weight characteristic data and production process data of the current material are obtained, and the MES splitting interface (only splitting but not completion) is called first to obtain the split film roll number. Then, the data is uploaded and bound to the film roll number through the MES upload and completion interface and completed.

[0300] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0301] It should be noted that:

[0302] The term "module" is not intended to be limited to a specific physical form. Depending on the specific application, a module can be implemented as hardware, firmware, software, and / or a combination thereof. In addition, different modules can share common components or even be implemented by the same components. There may or may not be clear boundaries between different modules.

[0303] The algorithm and display provided herein are not inherently related to any particular computer, virtual device or other equipment. Various general-purpose devices can also be used together with examples based on this. According to the above description, it is obvious that the structure required for constructing this type of device. In addition, the application is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the application described herein, and the above description of specific languages ​​is for the purpose of disclosing the best mode of implementation of the application.

[0304] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown in sequence as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowcharts of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0305] The above embodiments merely represent implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A pole piece production system, wherein: include: A manufacturing execution system, a coating host computer, a coating device, a cold pressing host computer, a cold pressing device, a die-cutting host computer, and a die-cutting device, wherein the coating device, the cold pressing device, and the die-cutting device are all provided with a radio frequency identification system; the radio frequency identification system includes a radio frequency reader and an electronic tag; The manufacturing execution system is connected to the coating host computer, the cold pressing host computer and the die-cutting host computer respectively; the coating host computer is connected to the coating device, the cold pressing host computer is connected to the cold pressing device, and the die-cutting host computer is connected to the die-cutting device; In the coating device, the cold pressing device and the die-cutting device, the radio frequency reader is installed on at least one side of the reel for placing the material roll, and the electronic tag is installed on the reel of the material roll; The radio frequency reader is used to read the radio frequency code of the material roll from the electronic tag of the material roll on the reel and transmit it to the manufacturing execution system.

2. The electrode production system according to claim 1, wherein: The coating device includes a first winding reel for mounting a coating material roll and a first bracket provided on at least one side of the first winding reel; The radio frequency reader is installed on at least one of the first brackets, and the radio frequency range of the radio frequency reader covers one of the first winding reels.

3. The electrode production system according to claim 2, wherein: The radio frequency reader mounted on the first bracket is used to read the electronic tag in the coating material roll on the first winding reel and transmit the read coating radio frequency data to the programmable controller included in the coating device; The programmable controller of the coating device is used to transmit the coating radio frequency data to the coating host computer; The coating host computer is used to determine the radio frequency code of the coating material roll based on the coating radio frequency data, and transmit the radio frequency code of the coating material roll to the manufacturing execution system.

4. The electrode production system according to claim 3, wherein: The coating host computer is used to count the radio frequency data with the same number of pre-set digits from the coating radio frequency data. The radio frequency code with the largest number of statistics is determined as the radio frequency code of the coating material roll.

5. The electrode production system according to any one of claims 1 to 4, wherein: The cold pressing device includes a first unwinding reel for mounting the coating material roll and a second winding reel for mounting the cold pressing material roll; A second bracket is provided on at least one side of the first unwinding reel, and the radio frequency reader is installed on at least one bracket of each second bracket; One end of the second winding reel is mounted on the first side surface of the first support plate, and a third bracket and a fourth bracket are also mounted on the first side surface; one end of the third bracket is mounted on the first side surface, and a radio frequency reader is provided on the end of the third bracket away from the first side surface; One end of the fourth bracket is connected to an end of the third bracket close to the first side surface, one side surface of the fourth bracket is connected to the first support plate, the end of the other end of the fourth bracket is close to the position where the second winding reel is connected to the first support plate, and a radio frequency reader is provided at the other end of the fourth bracket; the power of the radio frequency reader on the third bracket is greater than the power of the radio frequency reader on the fourth bracket.

6. The electrode production system according to claim 5, wherein: The radio frequency reader installed on the second bracket is used to read the electronic tag in the coating material roll on the first unwinding reel and transmit the read coating radio frequency data to the programmable controller included in the cold pressing device; The radio frequency reader / writer installed on the third bracket and the fourth bracket is used to read the electronic tag in the cold-pressed material roll on the second winding reel and transmit the read cold-pressed radio frequency data to the programmable controller included in the cold-pressing device; The programmable controller of the cold pressing device is used to transmit the coating radio frequency data and the cold pressing radio frequency data to the cold pressing host computer; The cold press host computer is used to determine the radio frequency code of the coating material roll on the first unwinding reel based on the coating radio frequency data; and, determining a radio frequency code of the cold-pressed coil based on the cold-pressed radio frequency data; The radio frequency code of the coated roll and the radio frequency code of the cold-pressed roll are transmitted to the manufacturing execution system.

7. The electrode production system according to claim 6, wherein: The cold pressing host computer is used to obtain the radio frequency code with the largest signal strength from the cold pressing radio frequency data transmitted by the radio frequency reader on the fourth bracket, as the radio frequency code of the first cold pressed material roll on the second winding reel close to the fourth bracket; and to eliminate the radio frequency code of the first cold pressed material roll from the cold pressing radio frequency data transmitted by the radio frequency reader on the third bracket, and obtain the radio frequency code with the largest signal strength from the remaining cold pressing radio frequency data as the radio frequency code of the second cold pressed material roll on the second winding reel close to the third bracket.

8. The electrode production system according to any one of claims 1 to 7, wherein: The die-cutting device includes a second support plate, a first fixing rod, a second fixing rod, a fifth bracket, a sixth bracket, a second unwinding reel for mounting a cold-pressed material roll, and a third winding reel for mounting a die-cutting material roll; One end of the second unwinding reel, one end of the third winding reel, one end of the first fixing rod and one end of the second fixing rod are all mounted on the first side surface of the second supporting plate; One end of the fifth bracket is mounted on the first fixing rod, and the other end of the fifth bracket is mounted with a radio frequency reader, the radio frequency range of the radio frequency reader covering the second unwinding reel; One end of the sixth bracket is mounted on the second fixing rod, and the other end of the sixth bracket is mounted with a radio frequency reader, the radio frequency range of the radio frequency reader covering the third winding reel.

9. The electrode production system according to claim 8, wherein: The radio frequency reader installed on the fifth bracket is used to read the electronic tag in the cold-pressed material roll on the second unwinding reel and transmit the read cold-pressed radio frequency data to the programmable controller included in the die-cutting device; The radio frequency reader installed on the sixth bracket is used to read the electronic tag in the die-cutting material roll on the third winding reel and transmit the read die-cutting radio frequency data to the programmable controller included in the die-cutting device; The programmable controller of the die-cutting device is used to transmit the cold pressing radio frequency data and the die-cutting radio frequency data to the die-cutting host computer; The die-cutting host computer is used to determine the radio frequency code of the cold-pressed material roll on the second unwinding reel based on the cold-pressed radio frequency data; and, determining a radio frequency code of the die-cutting roll based on the die-cutting radio frequency data; The radio frequency code of the cold pressed material roll and the radio frequency code of the die cut material roll are transmitted to the manufacturing Execution system.

10. The electrode production system according to claim 9, wherein: The radio frequency reader in the die-cutting device is used to perform multiple reading operations during the die-cutting process, and upload the radio frequency data read multiple times to the die-cutting host computer through the programmable controller of the die-cutting device; The die-cutting host computer is used to select the radio frequency code that is read the most times from the radio frequency data uploaded by each radio frequency reader in the die-cutting device as the radio frequency code finally identified.

11. The electrode production system according to any one of claims 1 to 10, wherein: A plurality of electronic tags are installed on the inner wall of the roll, and the data stored in each electronic tag includes the radio frequency code of the roll and the identification of the electronic tag, and the character string with the first preset digit is the radio frequency code of the roll; A portion of the plurality of electronic tags is mounted on one end of the inner wall of the drum, and another portion of the plurality of electronic tags is mounted on the other end of the inner wall of the drum.

12. The electrode production system according to any one of claims 1 to 12, wherein: The radio frequency identification system further includes a mounting member, the mounting member including a body, a spring formed on the body, and a fixing member; One side of the body is an arc surface, and the other side is provided with a card slot, the electronic tag is inserted into the card slot, and the spring contacts the electronic tag and presses the electronic tag tightly; The fixing member is used to fix the mounting member on the inner wall of the drum, and the arc surface contacts the inner wall of the drum.

13. The electrode production system according to any one of claims 1 to 13, wherein: The coating device, the cold pressing device and the die-cutting device all include switches and programmable controllers; the electrode production system also includes a workshop logistics and radio frequency middleware system, an automatic guided vehicle system and a warehouse management system; In the coating device, the cold pressing device and the die-cutting device, the radio frequency reader in each device is connected to the programmable controller via a switch; The programmable controller of the coating device is connected to the coating host computer, the programmable controller of the cold pressing device is connected to the cold pressing host computer, and the programmable controller of the die-cutting device is connected to the die-cutting host computer; The manufacturing execution system, the workshop logistics and radio frequency middleware system, the automatic guided vehicle system, and the warehouse management system are all connected to the coating host computer, the cold pressing host computer, and the die-cutting host computer through a local area network.

14. A control method for a pole piece production system, wherein: Applied to the electrode production system according to any one of claims 1 to 13, the method comprising: In response to the coating rewinding signal, the RF reader at the rewinding reel of the coating process is controlled to read the RF code of the coating material roll from the electronic tag of the reeled coating material roll and generate the coating film roll number of the coating material roll; In response to the cold press unwinding signal, the radio frequency reader / writer at the unwinding reel of the cold press process is controlled to read the radio frequency code of the unwound coated material roll from the electronic tag of the unwound coated material roll; based on the radio frequency code of the unwound coated material roll, the corresponding coated film roll number is obtained; based on the obtained coated film roll number, the cold press film roll number is generated; in response to the cold press winding signal, the radio frequency reader / writer at the winding reel of the cold press process is controlled to read the radio frequency code of the cold press material roll from the electronic tag of the wound cold press material roll; In response to the die-cutting unwinding signal, the radio frequency reader / writer at the unwinding reel of the die-cutting process is controlled to read the radio frequency code of the unwound cold-pressed material roll from the electronic tag of the unwound cold-pressed material roll; based on the radio frequency code of the unwound cold-pressed material roll, the corresponding cold-pressed film roll number is obtained; based on the obtained cold-pressed film roll number, the die-cutting film roll number is generated; in response to the die-cutting rewinding signal, the radio frequency reader / writer at the rewinding reel of the die-cutting process is controlled to read the radio frequency code of the die-cutting material roll from the electronic tag of the rewound die-cutting material roll.

15. The method according to claim 14, wherein The method further comprises: In the coating process, the mapping relationship between the coating film roll number and the radio frequency code of the coating material roll obtained by winding is stored; In the cold pressing process, a mapping relationship between the radio frequency code of the unwound coating roll, the cold pressing film roll number, and the radio frequency code of the rewound cold pressing roll is stored; In the die-cutting process, a mapping relationship between the radio frequency code of the unwound cold-pressed material roll, the roll number of the die-cut film, and the radio frequency code of the wound die-cut material roll is stored.

16. The method according to claim 14 or 15, wherein: The coating material roll is provided with a plurality of electronic tags, and the method of reading the radio frequency code of the coating material roll includes: Based on the data of multiple electronic tags read, the number of electronic tags with the same number of pre-set digits is counted; The character sequence of the first preset number of digits is extracted from the data of the electronic tags with the largest number of digits counted as the radio frequency code of the coating material roll.

17. The method according to any one of claims 14 to 16, wherein: A first radio frequency reader and a second radio frequency reader are respectively provided on both sides of the winding reel of the cold pressing process, and the power of the first radio frequency reader is greater than the power of the second radio frequency reader; The step of reading the radio frequency code of the cold-pressed coil comprises: Selecting the RF code with the strongest RF signal strength from the RF codes read by the second RF reader as the RF code of the first cold-pressed material roll on the winding reel of the cold-pressing process close to the second RF reader; The RF code of the first cold-pressed material roll is removed from the RF codes read by the first RF reader, and the RF code with the strongest RF signal strength is obtained from the remaining RF codes as the RF code of the second cold-pressed material roll on the winding reel of the cold pressing process close to the first RF reader.

18. The method according to any one of claims 14 to 17, wherein: The step of reading the radio frequency code of the die-cut material roll comprises: The radio frequency reader at the reel that controls the die-cutting process reads the electronic tags of the reeled die-cut material multiple times; The radio frequency code read the most times is determined as the radio frequency code of the die-cutting material roll.

19. The method according to any one of claims 14 to 18, wherein: The method further comprises: In the coating process, in response to a winding end signal triggered by the cutter, the first side coating production volume of the target coating material roll currently wound is obtained; Recording the first-side coating production volume in the film roll information corresponding to the coating film roll number of the target coating material roll; Receiving a first side data collection end instruction, determining that coating of the first side of the target coated material roll is completed; Control the coating device to perform coating operation on the second side of the target coating material roll, the second side is another side opposite to the first side; A second side data collection end instruction is received, and it is determined that coating of the target coating material roll is completed.

20. The method according to any one of claims 14 to 19, wherein: The method further comprises: In the cold pressing process, a reeling end signal of the last split reel corresponding to the currently unrolled coated material roll is detected, and the current account quantity corresponding to the currently unrolled coated material roll is obtained; Calculate the ratio of the current account quantity to the number of rolls of each target cold-pressed roll, use the ratio as the account production of each target cold-pressed roll, and store the account production of each target cold-pressed roll in the film roll information of the cold-pressed film roll number corresponding to each target cold-pressed roll.

21. The method according to claim 20, wherein The method further comprises: In response to the winding end signal of the last split winding, obtaining the current physical quantity corresponding to the currently unwound coating material roll; When the current account quantity is less than the current physical quantity, in response to entering the die-cutting process, calculating the actual production volume of each target cold-pressed material roll based on the current physical quantity and the number of rolls of each target cold-pressed material roll; In the film roll information corresponding to the die-cut film roll number, the account production volume of each target cold-pressed material roll is respectively modified to the actual production volume of each target cold-pressed material roll.

22. The method according to any one of claims 14 to 21, wherein: The method further comprises: In response to a reeling end signal in the die-cutting process, obtaining the current account quantity and the current physical quantity of the currently unwound cold-pressed material roll; When the current physical quantity is less than or equal to the current account quantity, calculating a first ratio between the current physical quantity and the number of rolls of each die-cutting material roll, and storing the first ratio as the account production quantity of each die-cutting material roll in the film roll information of the die-cutting film roll number corresponding to each die-cutting material roll; In the case where the current physical quantity is greater than the current account quantity, the current account quantity of the currently unwound cold-pressed material roll recorded in the system is modified to the current physical quantity, and a second ratio between the modified current account quantity and the number of rolls of each die-cutting material roll is calculated, and the second ratio is stored as the account production quantity of each die-cutting material roll in the film of the die-cutting film roll number corresponding to each die-cutting material roll. Volume information.

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